Marcus Aurelius: “He who does not know what the world is, does not know where he is.”

There is one light of the sun, though it is interrupted by walls, mountains, and other things infinite.

Reflecting on all this, consider nothing to be great, except to act as thy nature leads thee, and to endure that which the common nature brings.

There is one intelligent soul, though it seems to be divided.

And how small a part of the whole substance; and how small a part of the universal soul; and on what a small clod of the whole earth thou creepest!