种一棵树最好的时间是20年前，第二好的时间是现在。

The more you look, the less you see.

为明天做的最好准备就是今天做到最好。

Come,my friends,Tis not too late to seek a newer world,For my purpose holds to sail beyond the sunset，And though we are not now that strength which in old days moved earth and heaven,That which we are, we are;-- One equal temper of heroic hearts, Made weak by time and fate, but strong in will. To strive, to seek, to find, and not to yield。

The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.