I'm a tenured professor, which means, basically, I don't have to work anymore.

I finally got around to calculus as a 32 year old tenured professor at Harvard, where I sat uncomfortably in classes with undergraduate students, little more than half my age.

And I feel blessed and fortunate that 15 years ago I had the courage to resign my tenured position at NYU and return to my home country where I can do these incredible rides with this group of troubled kids coming from Ethiopia and Morocco and Russia.