Meditations 7.28

Retire into thyself. The rational principle which rules has this nature, that it is content with itself when it does what is just, and so secures tranquillity.

Marcus Aurelius, Meditations 7.28, translated by George Long

Gather thyself into thyself. It is characteristic of the rational Ruling Faculty to be satisfied with its own righteous dealing and the peace which that brings.

Marcus Aurelius, Meditations 7.28, translated by C. R. Haines