Hasten [to examine] thy own ruling faculty and that of the universe and that of thy neighbor: thy own, that thy may make it just; and that of the universe, that thou mayst remember of what thou art a part; and that of thy neighbor, that thy mayst know whether he has acted ignorantly or with knowledge, and that thou mayst also consider that his ruling faculty is akin to thine.

IX, 22 - Meditations (c. 161–180 CE) - Book IX