"Poetry should... should strike the reader as a wording of his own highest thoughts, and appear almost a remembrance"

John Keats is recommending that poetry needs to have the ability to stimulate a strong psychological response in the reader, as if the words were their own ideas. He thinks that poetry must be able to get in touch with the reader on an individual level, as if the words were something they had actually currently experienced or considered previously. He is suggesting that poetry needs to be able to draw out the reader's innermost ideas and sensations, and that it ought to be able to stimulate a sense of familiarity and acknowledgment. He believes that poetry ought to be able to bring out the reader's deepest emotions and that it ought to have the ability to make them feel as if they are keeping in mind something they had currently understood. He is recommending that poetry ought to be able to bring out the reader's greatest thoughts and feelings, which it should be able to make them feel as if they are remembering something they had actually already known.