The speaker turns to the urn as a source of wisdom. We take it that he is feeling down on life and love and needs some good advice – and who better to give advice than a thousands-year-old pot? At first, it’s not clear what kind of help the urn can be, seeing as the world it depicts is so different from that of the speaker. But at the end of the poem, it delivers the message that beauty and truth are one and the same. What exactly this means has been a mystery ever since.
Keats wants the reader to approach the poem as the speaker approaches the urn.
If truth is the same as beauty, then truth is an spiritual experience and can change from one moment to the next.