减少思虑，来调养心气；减少性欲来调养肾气；不要妄动，来调养骨气；戒止嗔怒，来调养肝气；饮食素淡，来调养胃气；减少话语，来调养神气；博鉴群书，来调养胆气；顺应时令，来调养元气。

The true test of leadership is not what you do when you're being watched, but what you do when you're alone.

——在黄埔军校开学礼演说，1924年6月16日

You have to figure out what your own aptitudes are. If you play games where other people have the aptitudes and you don’t, you’re going to lose. And that’s as close to certain as any prediction that you can make. You have to figure out where you’ve got an edge. And you’ve got to play within your own circle of competence.

I have learnt how to live... how to be in the world and of the world, and not just to stand aside and watch.

The greatest happiness is to know the source of unhappiness.