NEVER give all the heart, for love <br />Will hardly seem worth thinking of <br />To passionate women if it seem <br />Certain, and they never dream <br />That it fades out from kiss to kiss; <br />For everything that's lovely is <br />But a brief, dreamy. Kind delight. <br />O never give the heart outright, <br />For they, for all smooth lips can say, <br />Have given their hearts up to the play. <br />And who could play it well enough <br />If deaf and dumb and blind with love? <br />He that made this knows all the cost, <br />For he gave all his heart and lost.<br /><br />William Butler Yeats<br /><br />http://www.poemhunter.com/poem/never-give-all-the-heart/