The walls of the educational system must come down. Education should not be a privilege, so the children of those who have money can study.

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.

【大意】人的贪欲多了，就会亏损道义；忧虑多了，就会损害智慧；畏惧多了，就会伤害勇气。

你无法回到过去改变开头，但可以从现在开始改变结局。

What can be shown, cannot be said.

The pain of discipline is better than the pain of regret.