Meditations by Marcus Aurelius Book 10 Page 10

from meats eaten, and partly from air breathed in, received all its influx, being the same then in no other respect, than a running river, maintained by the perpetual influx and new supply of waters, is the same.

That therefore which thou hast since received, not that which came from thy mother, is that which comes to change and corruption. But suppose that that for the general substance, and more solid part of it, should still cleave unto thee never so close, yet what is that to the proper qualities and affections of it, by which persons are distinguished, which certainly are quite different?

VIII. Now that thou hast taken these names upon thee of good, modest, true; of emfrwn, sumfrwn, uperfrwn; take heed lest at any times by doing anything that is contrary, thou be but improperly so