After all, life is never so jolly or so miserable as people seem to think.

The real reward of science is the thrill of understanding something new.

I'm very confident in my own skin.

Leadership is solving problems. The day soldiers stop bringing you their problems is the day you have stopped leading them.

孔子说：“譬如堆山，还差一筐，没堆成就停了，功亏一篑是自己造成的；譬如填坑，只倒一筐，继续填下去，坚持不懈是自己决定的。”