Meditations 5.34

Thou canst pass thy life in an equable flow of happiness, if thou canst go by the right way, and think and act in the right way. These two things are common both to the soul of God and to the soul of man, and to the soul of every rational being: not to be hindered by another; and to hold good to consist in the disposition to justice and the practice of it, and in this to let thy desire find its termination.

Marcus Aurelius, Meditations 5.34, translated by George Long

Thou hast it in thy power that the current of thy life be ever fair, if also 'tis thine to make fair way, if also in ordered way to think and act. The Soul of God and the souls of men and of every rational creature have these two characteristics in common: to suffer no let or hindrance from another, and to find their good in a condition and practice of justice, and to confine their propension to this.

Marcus Aurelius, Meditations 5.34, translated by C. R. Haines