Meditations 6.8

The ruling principle is that which rouses and turns itself, and while it makes itself such as it is and such as it wills to be, it also makes everything which happens appear to itself to be such as it wills.

Marcus Aurelius, Meditations 6.8, translated by George Long

The ruling Reason it is that can arouse and deflect itself, make itself whatever it will, and invest everything that befalls with such a semblance as it wills.

Marcus Aurelius, Meditations 6.8, translated by C. R. Haines