生命中最美好的东西都是免费的。显然，我们最宝贵的资源是时间。

The purpose of advertising is to sell. It is the only purpose.

"The future is not a place we are going, but a place we are creating."

The deepest theorems often have the simplest proofs - if you look at them from the right angle.

The game of life is the game of everlasting learning. At least it is if you want to win.