What does living according to nature mean?

Living according to nature does not mean living outdoors, following your instincts, or doing whatever feels natural to you. For the Stoics it means keeping your own faculty of choice, your reasoning mind, in the state it was built for: sound judgment, right action, and a will that stays free of confusion no matter what happens around it.

Epictetus makes this concrete in a small example. Before he goes to the baths, a place famous in the ancient world for crowding, splashing, and theft, he tells himself what he actually wants: "I will now go bathe, and keep my own mind in a state conformable to nature" (Handbook 4). It was to keep his mind conformable to nature while bathing. The bath can go wrong. His purpose does not have to.

This is the common misreading corrected: people hear "nature" and think of the natural world, or of some romantic idea of instinct and simplicity. Epictetus is using the word technically. Your nature, as a rational being, is to judge, choose, and act well. A splash of water conforms to the nature of water. A calm, undisturbed judgment conforms to the nature of a rational mind, even in a crowded bathhouse.

The same standard scales up to relationships. In Handbook 30, Epictetus works through duties that come from your relations to others: a father, a brother, a neighbor, a citizen. He does not ask whether your father is good or your brother is just. He asks what is your duty here, given the relation, keep your own faculty of choice in a state conformable to nature (Handbook 30). Even a bad father is still a father, and the relation itself defines what conformity to nature requires of you. Notice what Epictetus does not say. He does not say the other person's behavior determines whether you succeed. He says another will not hurt you unless you please, and you are hurt only when you judge that you are hurt (Handbook 30). The other person's character is not up to you. Your judgment about it is.

Seneca gives the same idea a different angle. Writing to Lucilius about progress in philosophy, he distinguishes real inward change from theatrical displays of it: unkempt hair, a couch on bare earth, scorn of ordinary comforts. Inwardly, he writes, we ought to be different in all respects, but our exterior should conform to society (Moral Letters 5.2). Nature, again, is not about outward signs. The philosopher who sleeps on the floor to look ascetic has missed the point as badly as the one who thinks nature means indulging every impulse. What matters is the quality of judgment inside, not the costume around it.

For a person who takes this seriously, the shift is in what counts as success. You stop measuring your day by what happened to you, whether the bath was calm, whether your brother was fair, and start measuring it by whether your judgments, desires, and actions stayed sound throughout. Seneca adds a further piece: he tells Lucilius that a guiding presence, a holy spirit, indwells within us and marks our good and bad deeds (Moral Letters 41.2), so that living well is watched and answered from within, not granted by external ritual. God is near you, he is with you, he is within you, he writes (Moral Letters 41.1). Whether you take that literally or as a way of saying reason is your own possession, the practical instruction is the same.

One concrete way to apply this: before an ordinary task today, name what nature the action has, the way Epictetus names bathing. Then ask afterward not whether things went smoothly, but whether your mind stayed conformable to nature while they didn't.