如果你无法飞翔,那就奔跑;如果你无法奔跑,那就快走;如果你无法快走,那就爬行。但无论如何,你必须继续前进。
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.