Try not to become a man of success but rather try to become a man of value. -- A. Einstein
不要为成功而努力，要为做一个有价值的人而努力。 -- 爱因斯坦   

If you saw the darkness in front of you, don't be afraid, that's because sunshine is at your back. 
如果你看到面前的阴影，别怕，那是因为你的背后有阳光。