Meditations 8.27

“Wipe off all idle fancies, and say unto thyself incessantly; Now if I will, it is in my power to keep out of this my soul all wickedness, all lust, and concupiscences, all trouble and confusion. But on the contrary to behold and consider all things according to their true nature, and to carry myself towards everything according to its true worth. Remember then this thy power that nature hath given thee.”