We must measure success not just in barrels produced, but in emissions avoided.

To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.

Persistence is key in mathematical research; many great results come from long struggles.

It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.

Escribir es una forma de terapia, a veces pienso que todos deberían escribir, así no habría necesidad de psicoanalistas.