Thought is an artist painting its pictures on the mind, so
producing its imagery on the walls of one’s immortal nature.
If evil, the mind becomes a mystic shrine painted with such
figures as were found in some of the chambers of Pompeii, where
excavators had to cover up the pictures because they were so
foul. If good, the mind is like the cells in the convent of San
Marco, at Florence, where Fra Angelico’s holy genius had painted
on the bare walls angel imaginings and celestial faces. (Text.)
(1517)