William Blake's visions and the Unio Artistica

To Blake art was a vision of the spiritual world, as he could talk about "Poetry, Painting & Music, the three Powers in Man of conversing with Paradise, which the flood did not Sweep away." Every work of art is an open window into eternity. God appears to man in art. Artistic inspiration is the same as the union with God. There is an unio artistica, a sister to the unio mystica. Blake accepts that reason cannot grasp the divine vision and understand it. That is why he always talks of the vision as appearing in stronger and better lineaments, and a stronger and better light than nature can produce or mortal and perishing organs can apprehend. But art can grasp it. The central conception of mysticism, the undescribable unio mystica, is present in Blake. He is a mystic. The only difference between Blake and the classical mystics is in terminology. When they say "God" Blake very often says "Art".