The device fell out of fashion and began to be associated with the use of over-the-top extended metaphors: people saw conceits as being strained rather than fanciful. In fact, the use of rhyme and meter can vary greatly in conceit poems.
Our two souls therefore, which are one, Though I must go, endure not yet A breach, but an expansion, Like gold to airy thinness beat. Examples of Conceits in Literature From Shakespeare's Romeo and Juliet-Juliet's father compares his crying daughter to a piece of bark tossed about on a sea and her eyes to the sea and her sighs to the wind : "Thou counterfeit'st a bark, a sea, a wind; For still thy eyes, which I may call the sea, Do ebb and flow with tears; the bark thy body is, Sailing in this salt flood; the winds, thy sighs; Who, raging with thy tears, and they with them, Without a sudden calm, will overset Thy tempest-tossed body.
To lead the reader to surprising and important discoveries by connecting different spheres of experience and language. More technical, traditional meaning: A particularly fanciful or elaborate extended metaphor in which the comparison that the metaphor is making is far-fetched, or even so far-fetched as to be strained.
Example 4 First having read the book of myths, and loaded the camera, and checked the edge of the knife-blade, I put on the body-armor of black rubber the absurd flippers the grave and awkward mask.
Such wilt thou be to me, who must, Like th' other foot, obliquely run; Thy firmness makes my circle just, And makes me end where I begun.
In it, he imagines his lover as a harbormaster and transforms himself into something like a metaphysical sailor. During that time, conceit did not at all carry a negative connotation—it was simply an elaborate and fanciful extended metaphor.