This mystery of the unconscious man, far deeper than any mystery of the conscious one, existing as it does in all men, existed peculiarly in Browning, because he was a very ordinary and spontaneous man. The same thing exists to some extent in all history and all affairs. Anything that is deliberate, twisted, created as a trap and a mystery, must be discovered at last; everything that is done naturally remains mysterious. ... [T]here is between making a map of a labyrinth and making a map of a mist. The life of Robert Browning, who combines the greatest brain with the most simple temperament known in our annals, would go on for ever if we did not decide to summarise it in a very brief and simple narrative. - Summary by G.K. Chesterton