只要能够改变你自己的头脑，你就可以永远保持年轻。

成功不在于你赚了多少钱，而在于你对人们生活的影响。

"The past is always with us, whether we acknowledge it or not."

The elements of consciousness are sensations, images, and affections.

Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be. Many things prevent knowledge including the obscurity of the subject and the brevity of human life.