20多岁时，人格的变化比人生中任何其他时期都要大。
Personality changes more during your 20s than at any other time in life.
解释：凡是有利的地方，虽然是极高的山，没有不可以上去的；即令有极深的水，没有不可以下去的。
Contemplating the weaknesses of others is easy； contemplating the weaknesses in yourself is hard， but it pays a much higher reward.