The paper defines two key terms of the last century: Deconstruction and Decreation. Emphasis is put on the second term, as it is useful to understand how Stevens composed his poetry and what he wanted to say about form and content in poetry in a modern context. In his essay "The Relations between Poetry and Painting" he talks about the term Decreation, which means the modern sensibility and mind that eye reality. Stevens' definition of decreation seems to fit well in some of Yeats's poems, the fact of which proves that it can be applied to modern poetry in general, as it has gone through the same soil and climate. Picasso exemplifies and consolidates the usefulness of the terms decreation and deconstruction. Stevens has made one term current and useful for deepening the understanding and appreciation of modern and contemporary poetry, and possibly modern and contemporary art.