Personality changes more during your 20s than at any other time in life.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

语出汉·桓宽《盐铁论·毁学》。坏话不说，坏事不干，可谓洁身自好。

节俭：只为对人对己有益的事情买单，即不要浪费。