Lucasta, frown, and let me die, <br />But smile, and see, I live; <br />The sad indifference of your eye <br />Both kills and doth reprieve. <br />You hide our fate within its screen; <br />We feel our judgment, ere we hear. <br />So in one picture I have seen <br />An angel here, the devil there.<br /><br />Richard Lovelace<br /><br />http://www.poemhunter.com/poem/to-lucasta-her-reserved-looks-2/
