Never give all the heart, for loveWill hardly seem worth thinking ofTo passionate women if it seemCertain, and they never dreamThat it fades out from kiss to kiss;For everything that's lovely isBut a brief, dreamy, kind delight.O Never give the heart outright,For they, for all smooth lips can say,Have given their hearts up to the play.And who could play it well enoughIf deaf and dumb and blind with love?He that made this knows all the cost,For he gave all his heart and lost.

For [W. B.] Yeats magic was not so much a kind of poetry as poetry a kind of magic, and the object of both alike was evocation of energies and knowledge from beyond normal consciousness.