A practical guide to applying Stoic philosophy to modern decision-making. Drawing from Marcus Aurelius, Epictetus, Seneca, and modern Stoic practitioners, this repository provides frameworks and exercises for making better decisions under pressure, uncertainty, and adversity.
- Why Stoicism for Decisions?
- Core Stoic Principles for Decision-Making
- The Dichotomy of Control
- Stoic Decision Frameworks
- Stoic Approaches to Common Decisions
- Daily Stoic Decision Practice
- Stoic Journaling for Decisions
- Quotes by Topic
- Resources
- License
Modern decision science reveals what the Stoics understood 2,000 years ago: our biggest decision-making failures come from emotional reactivity, fear of loss, concern with others' opinions, and confusion about what we can control.
Stoicism provides a practical operating system for:
| Challenge | Stoic Solution |
|---|---|
| Emotional decision-making | Pause between stimulus and response |
| Fear of the worst case | Pre-meditate on adversity (premeditatio malorum) |
| Analysis paralysis | Focus only on what you control |
| Concern with status/opinions | Align with virtue, not external validation |
| Regret and rumination | Accept what has happened (amor fati) |
| Short-term thinking | Take the view from above (sub specie aeternitatis) |
"Make the best use of what is in your power, and take the rest as it happens." — Epictetus
What you control: Your judgments, intentions, desires, aversions, actions What you don't control: Other people's opinions, the economy, weather, outcomes, the past
Decision implication: Evaluate choices based on the quality of your reasoning and effort, not on predicted outcomes. A good decision can have a bad outcome; a bad decision can get lucky.
The four Stoic virtues form a decision filter:
| Virtue | Question to Ask |
|---|---|
| Wisdom | Am I seeing this situation clearly, free from bias? |
| Courage | Am I choosing what's right over what's easy? |
| Justice | Am I treating others fairly? Would this harm someone? |
| Temperance | Am I being moderate, or am I driven by excess? |
"Let us prepare our minds as if we'd come to the very end of life." — Seneca
Life is finite. This isn't morbid — it's clarifying. When time is scarce, priorities become obvious.
"Do not seek for things to happen the way you want them to; rather, wish that what happens happen the way it happens: then you will be happy." — Epictetus
Accept and work with reality as it is, not as you wish it were. Every obstacle contains material for growth.
"Frequently consider the connection of all things in the universe." — Marcus Aurelius
Your decisions affect others. Consider the wider system, not just your immediate self-interest.
The most powerful Stoic decision tool is the simple question: "Is this within my control?"
WITHIN CONTROL OUTSIDE CONTROL
┌─────────────────────┬─────────────────────┐
HIGH │ FOCUS HERE │ PREPARE, THEN │
STAKES │ │ LET GO │
│ • Your effort │ • Market movements │
│ • Your preparation │ • Others' reactions │
│ • Your character │ • Competition │
│ • Your response │ • Economic cycles │
├─────────────────────┼─────────────────────┤
LOW │ DO IT │ IGNORE │
STAKES │ │ │
│ • Daily habits │ • Weather │
│ • What you eat │ • Traffic │
│ • What you read │ • Others' moods │
└─────────────────────┴─────────────────────┘
## Decision: [Your decision]
### What I control:
- [ ] My preparation
- [ ] My effort and execution
- [ ] My response to outcomes
- [ ] My ethical conduct
- [ ] [specific items]
### What I don't control:
- Other people's decisions
- Market conditions
- Timing / luck
- [specific items]
### My focus: [actions within my control]
### My acceptance: [things I cannot change]Origin: Marcus Aurelius, Meditations
Method: Mentally zoom out — from your desk, to your city, to the planet, to the cosmos. See your decision from the perspective of deep time and vast space.
Process:
- State your decision
- Imagine viewing it from 10 years in the future
- Imagine viewing it from 100 years in the future
- Imagine viewing it from the perspective of all humanity
- Ask: Does this still matter? What truly matters?
When to use: When you're caught up in drama, status anxiety, or petty conflicts. The view from above reveals what's genuinely important.
Example:
Should I respond to that hostile email?
- From 10 years: I won't remember this email
- From 100 years: Neither of us will be alive
- What matters: My character and the relationship, not "winning"
Origin: Seneca, Letters from a Stoic
"We should project our thoughts ahead of us at every turn and have in mind every possible eventuality instead of only the usual course of events." — Seneca
Method: Before making a decision, vividly imagine everything that could go wrong. Not to create fear, but to:
- Reduce the shock if bad things happen
- Prepare contingency plans
- Appreciate what you currently have
- Test whether you can handle the downside
Template:
## Pre-Mortem Meditation: [Decision]
### If I choose this path, what could go wrong?
1. [Worst case scenario]
2. [Second worst]
3. [Third worst]
### For each worst case:
**Scenario:** [description]
**Could I survive this?** Yes / No
**What would I do?** [recovery plan]
**What can I do NOW to prevent or prepare?** [action]
### Verdict:
If I can survive and recover from the worst case → Proceed
If the worst case is catastrophic and unrecoverable → ReconsiderSeneca's practice: He would periodically live as if he were poor — eating simple food, wearing rough clothing — to remind himself that the things he feared losing were survivable without.
Method: Ask yourself: "What would a wise, virtuous person do in this situation?"
The Stoics used the concept of the "Sage" — an ideal of perfect wisdom — as a north star. You don't need to be perfect; you need a direction.
Questions:
- What would Marcus Aurelius do?
- What would the wisest person I know advise?
- What would I tell my best friend to do?
- What would a person of complete integrity choose?
- If my reasoning were made public, would I be proud of it?
Template:
## The Sage Test: [Decision]
1. What does my fear/desire want me to do?
→ [emotional impulse]
2. What would the wisest person I know do?
→ [rational choice]
3. What's the gap between 1 and 2?
→ [the gap is caused by: fear / greed / pride / laziness]
4. My decision: [choose #2]Origin: Seneca, Epictetus
Principle: Regularly practice being uncomfortable so that when adversity strikes, you're prepared.
Decision application: Before deciding, ask: "Am I avoiding this because it's genuinely wrong, or because it's uncomfortable?"
Categories:
| Type | Example | What It Trains |
|---|---|---|
| Physical | Cold exposure, fasting, exercise | Tolerance for physical discomfort |
| Social | Honest conversations, public speaking | Courage and social resilience |
| Financial | Living below your means, saying no | Freedom from lifestyle inflation |
| Intellectual | Reading opposing views, admitting ignorance | Intellectual humility |
Origin: Seneca's emphasis on mortality; similar to Bezos's "Regret Minimization"
"Let us prepare our minds as if we'd come to the very end of life. Let us postpone nothing." — Seneca
Process:
- Imagine you are at the end of your life, looking back
- Which choice would the dying you wish you had made?
- What would you regret not doing?
- What would you regret wasting time on?
Key insight: Most regrets are acts of omission (things not done), not commission (things done badly). The Stoics would say: act with courage, accept the outcome.
Maintaining a Stoic decision journal helps build the habit of reflective decision-making over time. Platforms like KeepRule provide structured frameworks for recording your reasoning and reviewing outcomes, making it easier to practice the Stoic discipline of learning from experience.
Process:
- Make the best decision you can with available information
- Act with full commitment
- Accept the outcome — whatever it is — as material to work with
- Ask: "How can I use this outcome, good or bad, for growth?"
This eliminates:
- Decision paralysis (you'll work with any outcome)
- Regret (the outcome was always going to happen)
- Victim mentality (everything is material for growth)
Stoic question: "Am I choosing based on virtue (meaning, growth, contribution) or based on externals (status, salary, others' approval)?"
| Factor | Stoic Evaluation |
|---|---|
| Higher salary | Preferred indifferent — nice to have, not a reason alone |
| More prestige | Indifferent — others' opinions are outside your control |
| More meaningful work | Aligned with virtue — contributes to wisdom and justice |
| More growth | Aligned with virtue — develops wisdom and courage |
| Less stress | Consider: is it less stress, or less courage required? |
Stoic principles for money:
- Money is a "preferred indifferent" — useful but not essential for a good life
- Financial independence provides freedom, which enables virtue
- Excess wealth beyond sufficiency has diminishing returns on well-being
- Generosity is a virtue; hoarding from fear is not
Seneca's test: "Can I lose this and remain content?" If yes, you have a healthy relationship with it.
Stoic principles:
- You control your own behavior, not others'
- Focus on being the right partner, not finding the right partner
- Honest communication requires courage (a virtue)
- Endings are natural; resist them with grace, not denial
The Stoic crisis protocol:
1. PAUSE — Do not react immediately (unless physical danger)
2. ASSESS — What do I actually control right now?
3. FOCUS — Direct all energy to what I control
4. ACCEPT — Release attachment to what I cannot control
5. ACT — Execute with full commitment
6. REFLECT — What can I learn from this?
Stoic ethics framework:
- Does this align with the four virtues (wisdom, courage, justice, temperance)?
- Would I be comfortable if everyone knew my reasoning?
- Am I rationalizing what I want, or reasoning toward what's right?
- Is this the choice of character, or the choice of convenience?
Today's date: ___
What challenges might I face today?
1.
2.
3.
For each challenge, what is within my control?
1.
2.
3.
What virtue will I focus on today?
□ Wisdom □ Courage □ Justice □ Temperance
My intention: Today I will [action aligned with virtue].Today's date: ___
Three questions (from Seneca):
1. What bad habit did I curb today?
→
2. What fault did I resist?
→
3. In what area did I improve?
→
Decisions I made today:
- Decision: ___ | Was it virtuous? Yes/No | What would I change?
What am I grateful for?
1.
2.
3.Marcus wrote his Meditations as personal journal entries. Use his structure:
## [Date] — Decision Journal
### Reminder to self:
[A Stoic principle relevant to what you're facing]
### The situation:
[Describe without judgment — just facts]
### My initial reaction:
[What emotion arose? Fear, anger, desire, anxiety?]
### The Stoic response:
[What would the wise person do? What can I control?]
### My decision:
[What I chose and why]
### Outcome (fill in later):
[What happened? What did I learn?]"Some things are within our power, while others are not. Within our power are opinion, motivation, desire, aversion, and, in a word, whatever is of our own doing. Not within our power are our body, our property, reputation, office, and, in a word, whatever is not of our own doing." — Epictetus
"The impediment to action advances action. What stands in the way becomes the way." — Marcus Aurelius
"It is not that we have a short time to live, but that we waste a great deal of it." — Seneca
"We suffer more often in imagination than in reality." — Seneca
"Waste no more time arguing about what a good man should be. Be one." — Marcus Aurelius
"Loss is nothing else but change, and change is nature's delight." — Marcus Aurelius
"First say to yourself what you would be; and then do what you have to do." — Epictetus
"The best revenge is to not be like your enemy." — Marcus Aurelius
"Very little is needed to make a happy life; it is all within yourself, in your way of thinking." — Marcus Aurelius
Primary Sources:
- Meditations — Marcus Aurelius
- Letters from a Stoic — Seneca
- Discourses and Enchiridion — Epictetus
Modern Stoicism:
- The Obstacle Is the Way — Ryan Holiday
- A Guide to the Good Life — William Irvine
- How to Think Like a Roman Emperor — Donald Robertson
Apply Stoic thinking to real-world decisions: For scenario-based exercises that apply Stoic and other classical decision principles to modern life choices, explore KeepRule Scenarios — real-world decision situations mapped to timeless wisdom.
Have a Stoic framework or exercise to add? PRs welcome. Please include the original Stoic source and a practical modern application.
MIT License — see LICENSE for details.