Meditations 9.22

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

Marcus Aurelius, Meditations 9.22, translated by George Long

Speed to the ruling Reason of thyself, and of the Universe, and of thy neighbour of thine own, that thou mayest make it just; of that of the Universe, that thou mayest therewithal remember of what thou art a part; of thy neighbour, that thou mayest learn whether it was ignorance with him or understanding, and reflect at the same time that it is akin to thee.

Marcus Aurelius, Meditations 9.22, translated by C. R. Haines