The Flea - John Donne uses the metaphysical conceit of a flea's blood sucking to convince a women they should have intercourse. With normal declarations of love absent, the reader is forced to look at love in a different perspective and question what love truly means. The Canonization - John Donne again uses conceits and allusions from the medieval philosophy of metaphysics in this poem to describe a two people in a relationship that cannot be turned into saints due to a large age difference.
The Altar - George Herbert uses conceit of the broken altar and the speakers heart and soul. The poems structure, resembling an altar, emphasizes the speakers dedication to the lord and forces the reader to consider what true dedication to religion looks like.