Explication of William Blake's A Poison Tree  William Blake's "A Poison Tree" (1794) stands as one of his most intriguing poems, memorable for its vengeful feel and sinister act of deceit. This poem appears in his famous work Songs of Innocence and Experience: Shewing the Two Contrary States of the Human Soul (1794), placed significantly in the "Songs of Experience" section. As with many of his poems, Blake wants to impart a moral lesson here, pointing of course to the experience we gain in our human existence at the cost of our innocence. With this poem, he suggests that holding a grudge (suppressed anger left unchecked) can be fatal to the self as well as the object of wrath. Through images, punctuation, and word choice, Blake warns that remaining silent about our anger only hinders personal and spiritual growth, making us bitter, and that a grudge left unchecked becomes dangerous, even murderous. In the first stanza, Blake comments on the need to confront a problem if peace and happiness are to prevail.