William Blake worked as a poet and engraver all his life
William Blake was religious but opposed the church as an organisation
William Blake wrote 'Songs of Innocence' and 'Songs of Experience'. Innocence was generally more optimistic while Experience was more cynical. A Poison Tree was published in Songs of Experience
William Blake claimed to see visions of God as a child and later in his life
William Blake supported the French Revolution
A Poison Tree is a Romantic poem: Simple language and use of nature makes this a poem from the Romanticism era. Blake calls for openness, honesty in personal relationships and he criticises authoritarian power, secrecy, hypocrisy and religion.