Change is inevitable, but growth is optional.

As to the gods, I have no means of knowing either that they exist or that they do not exist. For many are the obstacles that impede knowledge, both the obscurity of the question and the shortness of human life.

成功不是幸福的关键。幸福才是成功的关键。如果你热爱你所做的事情，你就会成功。