For the Stoics, justice was not primarily about law. It was about giving each person what they are owed.
Of the four Stoic cardinal virtues, justice is the one most explicitly directed outward. Wisdom, courage, and temperance primarily concern your relationship with yourself. Justice concerns your relationship with other people and with the world.
Stoic justice was not about punishment or law. It was about giving to each thing what it is owed. To a friend, honest engagement. To an enemy, fair treatment. To someone you have wronged, acknowledgment and repair where possible. The Stoics saw justice as the natural expression of recognising the full humanity of everyone you encounter.
Marcus Aurelius wrote about this frequently in the context of how to treat people who had wronged him. His test was not how they had behaved, but what a just person would do. Justice was internal. Your standard of conduct did not depend on whether the other person deserved it.
"The person who is honest from compulsion is not honest. The person who is honest because they understand why honesty matters, is honest."
Epictetus, Discourses
Making a list of people you have harmed is an act of justice in the Stoic sense. It is taking the reality of what has happened seriously. It is acknowledging that the harm existed, that the other person is real, and that something is owed.
The second part, becoming willing, is where the Stoic understanding of virtue becomes practical. The willingness does not have to come first. You do not have to feel willing before you can become willing. The Stoics understood that action precedes feeling as often as it follows it. You build willingness the way you build any other capacity: by practising it.
Notice the step does not say make amends yet. It says become willing. The list is the honest accounting. The willingness is the orientation. Both require courage. Neither requires perfection.
Write the list. Be thorough rather than dramatic. For each person, note briefly what the harm was and, if you can, what was driving you at the time. Not to excuse it, but to understand it. Understanding the pattern is part of not repeating it.