In this exaltation of love, as in several other points, Browning much resembles the German mystic, Meister Eckhart. To compare the two writers in detail would be an interesting task; it is only possible here to suggest points of resemblance. The following passage from Eckhart suggests several directions in which Browning's thought is peculiarly mystical:—

Intelligence is the youngest faculty in man.... The soul in itself is a simple work; what God works in the simple light of the soul is more beautiful and more delightful than all the other works which He works in all creatures. But foolish people take evil for good and good for evil. But to him who rightly understands, the one work which God works in the soul is better and nobler and higher than all the world. Through that light comes grace. Grace never comes in the intelligence or in the will. If it could come in the intelligence or in the will, the intelligence and the will would have to transcend themselves. On this a master says: There is something secret about it; and thereby he means the spark of the soul, which alone can apprehend God. The true union between God and the soul takes place in the little spark, which is called the spirit of the soul.[9]

The essential unity of God and man is expressed more than once by Browning in Eckhart's image: as when he speaks of God as Him

Who never is dishonoured in the spark
He gave us from his fire of fires.

He is at one with Eckhart, and with all mystics, in his appeal from the intellect to that which is beyond intellect; in his assertion of the supremacy of feeling, intuition, over knowledge. Browning never wearies of dwelling on the relativity of physical knowledge, and its inadequacy to satisfy man. This is perhaps best brought out in one of the last things he wrote, the "Reverie" in Asolando; but it is dwelt on in nearly all his later and more reflective poems. His maxim was—

Wholly distrust thy knowledge, then, and trust
As wholly love allied to ignorance!
There lies thy truth and safety. ...
Consider well!
Were knowledge all thy faculty, then God
Must be ignored: love gains him by first leap.

A Pillar at Sebzevar.

Another point of resemblance with Eckhart is suggested by his words: "That foolish people take evil for good, and good for evil." Browning's theory of evil is part of the working-out of his principle of what may be called the coincidence of extreme opposites. This is, of course, part of his main belief in unity, but it is an interesting development of it. This theory is marked all through his writings; and, although philosophers have dealt with it, he is perhaps the one poet who faces the problem, and expresses himself on the point with entire conviction. His view is that good and evil are purely relative terms (see The Bean-stripe), and that one cannot exist without the other. It is evil which alone makes possible some of the divinest qualities in man—compassion, pity, forgiveness patience. We have seen that Shelley shares this view, "for none knew good from evil"; and Blake expresses himself very strongly about it, and complains that Plato "knew nothing but the virtues and vices, the good and evil.... There is nothing in all that.... Everything is good in God's eyes." Mysticism is always a reconcilement of opposites; and this, as we have seen in connection with science and religion, knowledge and love, is a dominant note of Browning's philosophy. He brings it out most startlingly perhaps in The Statue and the Bust, where he shows that in his very capacity for vice, a man proves his capacity for virtue, and that a failure of energy in the one implies a corresponding failure of energy in the other.

At the same time, clear knowledge that evil is illusion would defeat its own end and paralyse all moral effort, for evil only exists for the development of good in us.

Type needs antitype:
As night needs day, as shine needs shade, so good
Needs evil: how were pity understood
Unless by pain?

This is one reason why Browning never shrank from the evil in the world, why indeed he expended so much of his mind and art on the analysis and dissection of every kind of evil, laying bare for us the working of the mind of the criminal, the hypocrite, the weakling, and the cynic; because he held that—