Your theory is crazy, but it's not crazy enough to be true.

"In literature, we find the truth of our own existence."

积极心理学不仅仅是感觉良好，而是关于美好的生活。

人生短暂如白马过隙，若不及时享受生活，年老时只能空自悲伤。

勇敢是一种德行，不仅在战斗中，在生活中的各个方面都需要勇敢。

Problem solving is the central activity of intelligent systems.

It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all doing direct the other way.