A 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 YeatsSome burn damp faggots, others may consume The entire combustible world in one small room.
William Butler YeatsWhen you are old and gray and full of sleep, and nodding by the fire, take down this book and slowly read, and dream of the soft look your eyes had once, and of their shadows deep.
William Butler YeatsCome Fairies, take me out of this dull world, for I would ride with you upon the wind and dance upon the mountains like a flame!
William Butler Yeats