"Songs of Innocence and of Experience" by William Blake is a collection of illustrated poems combined in 1794. Blake hand-engraved, printed, and colored unique artwork to accompany each poem, exploring childhood innocence and experience as contrary states of the human soul. Originally published as separate volumes, the combined work shows pastoral harmony alongside subtle dangers of naiveté. Each page features distinctive illustrations that intensify the poems' meanings, making Blake's vision inseparable from both visual art and verse. The collection became a hallmark of Romanticism and has inspired countless musical adaptations.