数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
Some books are to be tasted, others to be swallowed, and some few to be chewed and digested.
Happiness is the key to life. Without happiness, you have nothing.
唯一比被人谈论更糟糕的事情是不被人谈论。
在数学中,旅程和目的地同样重要。
A great brand is built on trust, quality, and consistency.