The theory found a melodious echo in Tennyson's In Memoriam, a great hymn of God, Freedom and Immortality on a basis of speculative agnosticism.
But at least we may say that agnosticism is much less clear in Browning than in Tennyson.
Religion may " feel," like Tennyson's " man in wrath, " and may expatiate in an undefined awe; science alone is to possess the " knowable."
As early as 1875 he published a volume of poems in Gujarati, followed in 1877 by The Indian Muse in English Garb, which attracted attention in England, notably from Tennyson, Max Miller, and Florence Nightingale.
He also dealt with the condemnation of Pope Honorius, carried on a controversial correspondence with John Stuart Mill, and took a leading part in the discussions of the Metaphysical Society, founded by Mr James Knowles, of which Tennyson, Huxley and Martineau were also prominent members.