一个命题的证明是一种性质使得我们相信该命题的过程。
A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.
最终，重要的不是事实，而是我们通过它们揭示的真相。
解释：做大事的不做小事，要成就大事的不成就小事。
Sometimes, the most heroic act is to continue living.
Take away love and our earth is a tomb.