The mind is a dynamic system of interrelated processes.
不要害怕放弃好的，去追求伟大的。
The consistency of your endeavors (exercise， companionship， work) is more important than the quantity. Nothing beats small things done every day， which is way more important than what you do occasionally.
众所周知，同样的环境可能以非常不同的方式影响不同的个体。
The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.