"Every story is a story about death, but perhaps every story is also about life."

TRANQUILLITY. Be not disturbed at trifles, or at accidents common or unavoidable.

数学之美在于它能够揭示看似复杂事物背后的简单性。

沾沾自喜时，应该约束反省；怒不可遏时，应该约束反省；怠倦懒惰时，应该约束反省；思想狂放时，应该省约束反。