William Blake is trying to compare both innocence and experience in his poems. His main focus in his poems were children, and how they start off purely innocent. Over time the children start to learn gain experience which may lower the innocence. In a child's life they may not have a lot of choices and that may in turn result in either a better or worse growing. In Blake's poems he seems to make a lot of connection to happiness with his words of the shining sun and all these other types of delightful imagery.