Knowledge and Sense Experience in Swinburne's Late Poetry

In “Triads” (1878), Algernon Charles Swinburne traces the boundary of human knowledge to the limit of sense experience. What falls beyond our senses, he argues, we cannot know: The sense to the flower of the fly, The sense of the bird to the tree, The sense to the cloud of the light, Who can tell me? […] The secret of passing away, The cost of the change of the moon, None knows it with ear or with eye, But all will soon. (Poems 3: 111)