做你自己，因为没有人能比你做得更好。
Just be yourself, there is no one better.
I'm not afraid of storms, for I'm learning how to sail my ship.
As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.
永远不要低估一个想法改变世界的力量。
快乐有益于身体，但悲伤才能发展心灵的力量。
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。