The true poet is all the time a visionary and whether with friends or not, as much alone as a man on his death bed.
William Butler YeatsA symbol is indeed the only possible expression of some invisible essence, a transparent lamp about a spiritual flame; while allegory is one of many possible representations of an embodied thing, or familiar principle, and belongs to fancy and not to imagination: the one is a revelation, the other an amusement.
William Butler Yeats