Meditations 2:12

The speed with which all of them vanish—the objects in the world, and the memory of them in time. And the real nature of the things our senses experience, especially those that entice us with pleasure or frighten us with pain or are loudly trumpeted by pride. To understand those things—how stupid, contemptible, grimy, decaying, and dead they are—that's what our intellectual powers are for. And to understand what those people really amount to, whose opinions and voices constitute fame. And what dying is—and that if you look at it in the abstract and break down your imaginary ideas of it by logical analysis, you realize that it's nothing but a process of nature, which only children can be afraid of. (And not only a process of nature but a necessary one.) And how man grasps God, with what part of himself he does so, and how that part is conditioned when he does.