If you don't make mistakes, you're not trying hard enough.

每个人都知道成为自己的痛苦与欢愉。

He who is not contented with what he has，would not be contented with what he would like to have.

Profitability and sustainability are not opposites - they're two sides of the same coin.

The quality of an organization's customer service determines the quality of its customer loyalty.

The complexity of a learning problem is often determined by the size and structure of the hypothesis space.

意识总是关于超越自身的事物。