对所有人有礼，与多数人交际，和少数人亲近，交一位朋友，不与人为敌。
True art should challenge the audience's perception. 真正的艺术应该挑战观众的认知。
至今一切社会的历史都是阶级斗争的历史。
The best time to plant a tree was 20 years ago. The second best time is now.
人心容易偏离正道，道心微妙难明，只有精研专一，才能持守中道。
追求数学真理是一项崇高的努力。
Education is the root system that sustains all progress in responsible forestry practices.
We are all in the gutter, but some of us are looking at the stars.
