数学中最深刻的思想往往源于最简单的观察。
The most profound ideas in mathematics often arise from the simplest observations.
What we gain by experience is more real and more solid than what we gain by reasoning.
Some books are to be tasted， others to be swallowed， and some few to be chewed and digested.
I have so much admiration for women who are fearless and unapologetic about who they are.
Light is the most important element in architecture. Without light, there is no space.
