A sensible man will remember that the eyes may be confused in two ways – by a change from light to darkness or from darkness to light; and he will recognize that the same thing happens to the soul. – Plato

A man should learn to detect and watch that gleam of light which flashes across his mind from within. – Ralph Waldo Emerson

Keep your flame lit, and you will never feel darkness. – J.Parker

As far as we can discern, the sole purpose of human existence is to kindle a light in the darkness of mere being. – Carl Gustav Jung