Meditations by Marcus Aurelius Book 9 Page 12

Do they what they can, nature doth prevail. And so shalt thou confess, if thou dost observe it. For sooner mayst thou find a thing earthly, where no earthly thing is, than find a man that naturally can live by himself alone.

VIII. Man, God, the world, every one in their kind, bear some fruits.

All things have their proper time to bear. Though by custom, the word itself is in a manner become proper unto the vine, and the like, yet is it so nevertheless, as we have said. As for reason, that beareth both common fruit for the use of others; and peculiar, which itself doth enjoy. Reason is of a diffusive nature, what itself is in itself, it begets in others, and so doth multiply.

IX. Either teach them better if it be in thy power; or if it be not, remember