Epictetus was born a slave in the Roman empire, approximately 50 CE. He was owned by a man named Epaphroditus, who is reported to have twisted Epictetus's leg as a demonstration of his power over him.
Epictetus said, calmly: you are going to break it.
His leg broke. He said: did I not tell you so?
This is not a story about pain tolerance. It is a story about where a human being had located their self — so completely inside, so beyond the reach of external force, that the external force found nothing essential to grip.
The entire Stoic philosophy of freedom flows from this single distinction: between what is eph' hēmin — up to us — and what is ouk eph' hēmin — not up to us. Up to us: our judgments, our impulses, our desires, our aversions. Everything else: body, reputation, property, position, and in one word, everything which is not our own activity.
Most people spend their lives trying to control what is not up to them and neglecting what is. This is not a character flaw. It is the default human operating system. The Stoic practice is the deliberate reversal of this priority — which is why it produces, in those who practice it, a quality of equanimity that appears, to those who have not done the work, to be either superhuman or inhuman.
Epictetus was eventually freed and established a school in Nicopolis. The students who came to him were not slaves. They were Roman citizens of means — people who had what the world said they needed in order to be free. His teaching to them was the same as the teaching his life had demonstrated: the freedom you are seeking in external conditions is not available there. It never was.
The application to modern professional life is direct. The executive who has located their stability in their title, their compensation, their status — who has, in other words, given others the power that Epaphroditus had over Epictetus — is not free. They are, in the most important sense, still a slave.
The liberation Epictetus describes is not the absence of external conditions. It is the recognition that external conditions do not determine the quality of the inner life. This recognition, sustained through practice, produces the most durable form of confidence available — not confidence that things will go well, but confidence that you will be equal to whatever happens.
His leg broke. He kept teaching. Nothing essential had been touched.