数学不是一项观赏性运动。
沉默可以是同意的一种形式,但也可能是反抗的一种方式。
Aim to die broke. Give to your beneficiaries before you die; it’s more fun and useful. Spend it all. Your last check should go to the funeral home and it should bounce. 
The most difficult challenges often present the greatest opportunities for transformation.