The final lines of John Keats’ “Ode on a Grecian Urn” (“Beauty is Truth, Truth Beauty ─ that is all/Ye know on earth, and all ye need to know”) are among the most quotable in English literature. They could be dismissed as just a rhetorical flourish – a resonant example of an ageold literary device known as antimetabole. However, in biographical and historical context, the lines masterfully embody ideas regarding aesthetics, science, metaphysics and that inspired our Unitarian Universalist liberal religious faith. They also express a variety of spiritual experience not reliant on belief in a transcendent God.