Contrast is the antonym of simile. In poetic compositions, it is common for poets to set out an elaborate contrast or elaborate simile as the argument. For example, John Donne and the metaphysical poets developed the "conceit" as a literary device, where an elaborate, implausible, and surprising analogy was demonstrated. In Renaissance poetry, and particularly in sonnets, the contrast was similarly used as a poetic argument. In such verse, the entire poem argues that two seemingly alike or identical items are, in fact, quite separate and paradoxically different. These may take the form of 'my love is unlike all other women' or 'I am unlike her other loves.'
In the early 18th century, a theory of wit developed by English writers (particularly John Locke) held that judgment sees the differences in like things, imagination or fancy sees the likeness in different things, and wit operates properly by employing judgment and fancy to form sound propositions. In lyric poetry, the author is often attempting to show how what seems to be solely an exercise of judgment or fancy is, in fact, wit.