The only thing I can do is write. Everything else bores me.

The best stock to buy is the one you already own.

Read not to contradict and confute; nor to believe and take for granted; nor to find talk and discourse; but to weigh and consider.

数学家是能在定理之间找到类比的人；更好的数学家是能在证明之间看到类比的人；而最好的数学家是能注意到理论之间类比的人。