My hero

This is my hero, Grigori Perelman. He solves the world's hardest problems, and that requires a level of dedication that leaves no space for anything else. 
So he lives in a run down St Petersburg apartment with his mother. I am sure he would love to have friends, especially a girlfriend, but if he did that then he would not be able to solve those problems. He made a choice.

His choice will create a better world for centuries to come, in ways that we cannot even imagine. One day he will be loved and admired. But right now he is just a weird guy who probably doesn't wash enough. Indistinguishable from a million other weirdos. He does what he does purely because it is right, for no other reward. That is true heroism.

My favorite quote, about why he turned down a million dollar prize for his work:  "I know how to control the universe. So tell me, why should I run for a million?”