Man has no greater enemy than himself. I have acted contrary to my sentiments and inclination; throughout our whole lives we do what we never intended, and what we proposed to do, we leave undone.
PetrarchHitherto your eyes have been darkened and you have looked too much, yes, far too much, upon the things of earth. If these so much delight you what shall be your rapture when you lift your gaze to things eternal!
Petrarch