The secret to success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you’re in control of your life. If you don’t, life controls you.
数学的研究是所有智力和精神进步不可或缺的基础。
Behavior is not just a response to a stimulus, but is guided by expectations and purposes.
What worries you, masters you.
"The world is not a wish-granting factory."