Gaze not on beauty too much, lest it blast thee; nor too long, lest it blind thee; nor too near, lest it burn thee. If thou like it, it deceives thee; if thou love it, it disturbs thee; if thou hunt after it, it destroys thee. If virtue accompany it, it is the heart's paradise; if vice associate it, it is the soul's purgatory. It is the wise man's bonfire, and the fool's furnace.

Uniform with the Enchiridion: Spare Minutes Or Resolved Meditations and Premeditated Resolutions (ed. 1822)