"Illustrations are not just decorations; they are an integral part of the storytelling."

Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: Ye must have faith.

The truth is rarely pure and never simple.

学得越多，知道得越多；知道得越多，忘记得越多；忘记得越多，知道得越少。那么，为什么要学习呢？

数学中的每个问题都有解答，关键在于找到正确的路径。