In order to discuss Blake's concepts of Reason and Energy adequately, they must first be understood. For Blake, as he states in `The Marriage of Heaven and Hell', there was no progression without contraries (attraction and repulsion, reason and energy, love and hate) and it is only from these contraries, through this dialectic approach, that we get what is commonly thought of as `Good and Evil'. As Blake further explains in the same book: "Good is the passive that obeys Reason. Evil is the active springing from Energy. Good is Heaven. Evil is Hell." `The Lamb', from `Songs of Innocence', is a perfect example of the all things `good', innocence of youth, the serenity and reciprocity of the countryside, essentially everything to do with a state of primal innocence. `The Tyger', from `Songs of Experience', is almost the stark opposite of `The Lamb', in that it refers to...