"Sometimes the hardest part isn’t letting go but rather learning to start over."

The elegance of a proof is as important as its correctness.

The real question is not whether machines think but whether men do.

Great spirits have often encountered violent opposition from weaker minds.

黑暗无法驱走黑暗，只有光可以；仇恨无法消除仇恨，只有爱能做到。