The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.

希望是长着羽毛的东西，栖息在灵魂里。

You are never too old to set another goal or to dream a new dream.

Green and low-carbon development is not a multiple-choice question, but a must-answer question.

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.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

If you're not doing some things that are crazy, then you're doing the wrong things.