"The only way to make sense out of change is to plunge into it, move with it, and join the dance."

理性预期假说并不意味着人们能够完美地预测未来。

The past is a foreign country; they do things differently there.

The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.