The most important thing in life is to have a sense of purpose and to pursue it with passion.

You are too generous to trifle with me. If your feelings are still what they were last April, tell me so at once. My affections and wishes are unchanged, but one word from you will silence me on this subject for ever.

Psychology should concern itself not with static elements, but with the dynamic interplay between organism and environment.

孤独是自我的贫乏；独处是自我的丰富。

The key to success is failure… Success is made up of 99 percent failure.