text: valediction: forbidding mourning? what is the conceit in this poem?   as virtuous men pass mildly away, and whisper to their souls to go, whilst some of their sad friends do say, "the breath goes now," and some say, "no,"   so let us melt, and make no noise, no tear-floods, nor sigh-tempests move; 'twere profanation of our joys to tell the laity our love.   moving of the earth brings harms and fears, men reckon what it did and meant; but trepidation of the spheres, though greater far, is innocent.   dull sublunary lovers' love (whose soul is sense) cannot admit absence, because it doth remove those things which elemented it.   but we, by a love so much refined that our selves know not what it is, inter-assured of the mind, care less, eyes, lips, and hands to miss.   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.   if they be two, they are two so as stiff twin compasses are two: thy soul, the fixed foot, makes no show to move, but dot the last three quatrains (of which only part of the first made it into your question) are a good example of a conceit, in which the metaphor of the compass is developed at length.