世界充满了符号，但我们常常太盲目而看不到它们。
"The world is full of signs, but we are often too blind to see them."
The greatest works are those that are still being read long after their authors have died.
无限小在自然中的作用是无限大的。
自然选择是已知唯一能够构建功能复杂性的自然过程。