As both dramatic and metaphysical poet, Mr. Browning is inspired by one central doctrine: that while thought is absolute in itself, it is relative or personal to the mind which thinks it; so that no one man can attain the whole truth of any abstract subject, and no other can convict him of having failed to do so. And he also believes that since intellectual truth is so largely for each of us a matter of personal impression, no language is special enough to convey it. The arguments which he carries on through the mouths of his men and women often represent even moral truth as something too subtle, too complex, and too changing, to be definitely expressed; and if we did not see that he reverences what is good as much as he excuses what is bad, we might imagine that even on this ground he considered no fixed knowledge to be attainable. These opinions are, however, closely bound up with his religious beliefs, and in great measure explained by them. He is convinced that uncertainty is essential to the spiritual life; and his works are saturated by the idea that where uncertainty ceases, stagnation must begin; that our light must be wavering, and our progress tentative, as well as our hopes chequered, and our happiness even devoid of any sense of finality, if the creative intention is not to frustrate itself; we may not see the path of progress and salvation clearly marked out before us. On the other hand, he believes that the circumstances of life are as much adapted to the guidance of each separate soul as if each were the single object of creative care; and that therefore while the individual knows nothing of the Divine scheme, he is everything in it.
This faith in personality is naturally abstruse on the metaphysical side, but it is always picturesque on the dramatic; for it issues in that love of the unusual which is so striking to every reader of Mr. Browning’s works; and we might characterize these in a few words, by saying that they reflect at once the extent of his general sympathies, and his antagonism to everything which is general. But the “unusual” which attracts him is not the morbid or the monstrous, for these mean defective life. It is every healthy escape from the conventional and the commonplace, which are also defective life; and this is why we find in his men and women those vivid, various, and subtly compounded motives and feelings, which make our contact with them a slight, but continuous electric shock.