Sometimes the only way to stay sane is to go a little crazy sometimes.

数学中真正的挑战不是解决问题，而是提出正确的问题。

Money and success don't change people, they merely amplify what is already there.

Do not let your fire go out, spark by irreplaceable spark.

心理学的任务是分析给定的事物。

Of all the means which wisdom acquires to ensure happiness throughout the whole of life, by far the most important is friendship.