"A Poison Tree" is a poem written by William Blake, published in 1794 as part of his Songs of Experience collection. It describes the narrator's repressed feelings of anger towards an individual, emotions which eventually lead to murder. The poem explores themes of indignation, revenge, and more generally the fallen state of mankind. Background The Songs of Experience was published in 1795 as a follow up to Blake's 1789 Songs of Innocence. The two books were published together under the merged title Songs of Innocence and Experience, showing the Two Contrary States of the Human Soul: the author and printer, W. Blake featuring 54 plates. The illustrations are arranged differently in some copies, while a number of poems were moved from Songs of Innocence to Songs of Experience. Blake continued to print the work throughout his life. Of the copies of the original collection, only 28 published during his life are known to exist, with an additional 16 published posthumously. Only 5 of the poems from Songs of Experience appeared individually before 1839 with "A Poison Tree" first published in the 1830 London University Magazine. The original title of the poem is "Christian Forbearance", and was placed as number 10 in the Rossetti manuscript, printed on a plate illustrated by a corpse under a barren tree. The body was shown in a similar manner to the crucified corpse of Blake's "A Negro on the Rack" in John Gabriel Stedman's Narrative. Lesson The poem relies on a trochaic beat. It consists of four stanzas and begins with an emphasis on the first person. The first person perspective changes with the use of the word "And" after the first stanza, while the emphasis on "I" is replaced The original draft has a line drawn beneath the first stanza, which could denote that Blake originally intended the poem as concluding at the 4th line. There are also many differences between the manuscript and published versions of the poem, with the original line 3 and 4 reading "At a Friends Errors Anger Shew / Mirth at the Errors of a Foe." Themes The poem suggests that acting on anger reduces the need for vengeance, which may be connected to the British view of anger held following the start of the French Revolution. The revolutionary forces were commonly connected to the anger, with opposing sides arguing that the anger was either a motivating rationale or