A Poison Tree is a poem that focuses on the emotion of anger and the consequences of it. It deals with the darker side of the human psyche. The poet expressed his anger, everything was fine, but when he kept it inside, it began to grow, eventually becoming a metaphorical tree with poison fruit. The foe ends up under the tree, destroyed by the speaker’s pent up anger. Poet advises the readers to express the anger rather than holding it to oneself. Anger sustained damages both.
