The winds and waves are always on the side of the ablest navigators.

I have to be alone very often. I’d be quite happy if I spent from Saturday night until Monday morning alone in my apartment. That’s how I refuel.

数学的真正乐趣在于发现的过程，而不仅仅是结果。

An empire founded by war has to maintain itself by war.

真正的幸福来自内心，而不是外部的成就或财富。