Epictetus

From slave to sage - Epictetus lived the most dramatic rags-to-riches story in philosophy. Born with a disability and owned by one of Nero's guards, he was so mistreated that his leg was permanently damaged. Yet somehow, this man who literally couldn't control his own body became history's greatest teacher of control. His philosophy? You're already free - you just don't realize it yet. He never wrote a single word himself (couldn't be bothered), but his student Arrian was such a fanboy that he frantically scribbled down every lecture. The result? The 'Enchiridion' - basically an ancient life hack manual that's still weirdly relevant 2,000 years later.