The Marriage of Heaven and Hell, written between 1790 and 1793, is the most complex work of Blake's early years. It consists of 24 Plates (as well as three further Plates under the separate title “A Song of Liberty”) and has at its heart an opposition between Heaven, conceived as an image of restraint and passivity, and Hell, an image of energy and action. Both of these “contraries”, Blake claims, are necessary for human life; but there is little doubt as to which is more to his taste.