学习是系统中产生的任何变化，这种变化或多或少会永久性地改变其适应环境的能力。
The real conflict is between the rights of the individual and those of society.
找到真相的最好方法是无论证据指向哪里都要跟随。
The Federal Reserve is not currently forecasting a recession.
成为英雄的最大障碍是怀疑自己是否会证明自己是个傻瓜；真正的英雄主义是抵制这种怀疑；最深刻的智慧是知道何时应该抵制它，何时应该服从它。
You have to have confidence in your ability, and then be tough enough to follow through.
The greatest obstacle to progress is not ignorance, but the illusion of knowledge.
