The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
Technology itself has no value; it only becomes meaningful when it solves real problems.
The first duty of the sovereign, that of protecting the society from the violence and invasion of other independent societies, can be performed only by means of a military force.
君子重视个人主观努力,不会去指望上天的恩赐,所以每天都会有所进步。