理解计算的极限与理解数学的极限同样重要。
有时我会感到,我伸展开来覆盖大地、延伸进万物:我感到自己生活在每一棵树木中、生活在浪花中、生活在往来无定的云朵和动物中、生活在季节的轮回中。
Character is the sum of one's habits.
Optimism is a learned skill. Once you learn it, you can improve your life in every way.