1. With copper as a mirror, you can straighten your clothes; Taking the past as a mirror, we can know the rise and fall; Take people as a mirror, you can know the gains and losses. -"Old Tang Book? Biography of Wei Zhi

2. No one is perfect. Everyone makes mistakes. As long as they are corrected, everything will be fine.

3. It is unwise to know too much; It is not brave to know and not change. -Li Gou's The Ninth Book of Changes