The world is all the richer for having a devil in it, so long as we keep our foot upon his neck.

The past is a shadow that follows us, but it doesn't have to define us.

每一个挑战都是了解自己新东西的机会。

你必须愿意走出舒适区才能成长。

Science is not just about theory; it's about making things that work in the real world.

No man is useless in this world who lightens the burden of someone else.

智慧在于认识自己。