Thought is the means by which the organism negotiates its way through the world.
在糟糕的时候抱有希望不仅仅是愚蠢的浪漫。这是基于人类历史不仅是残酷的历史,也是同情、牺牲、勇气和善良的历史。
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.