The universal nature out of the universal substance, as if it were wax, now molds a horse, and when it has broken this up, it uses the material for a tree, then for a man, then for something else.
Marcus AureliusLive your life as if you are ready to say goodbye to it at any moment, as if the time left for you were some pleasant surprise.
Marcus AureliusRemember how often you have postponed minding your interest, and let slip those opportunities the gods have given you. It is now high time to consider what sort of world you are part of, and from what kind of governor of it you are descended; that you have a set period assigned you to act in, and unless you improve it to brighten and compose your thoughts, it will quickly run off with you, and be lost beyond recovery.
Marcus Aurelius