Failure is just another way to learn.
创造东西真的很难。你必须非常在乎它,才能克服所有的失望和挫折。
不要说不会消魂,西风卷起帘子,人比黄花还要消瘦。
Mathematics is the art of giving the same name to different things.
The goal of behavior is always the reduction of some drive or need.
"The biggest victories come after the toughest battles."