As to the artist and his art in it, that is quite a different matter; and as there are few of Browning's poems which reach a higher level than this both in form, thought, and spiritual passion, it may be worth while, for once, to examine a poem of his at large.
Browning's imagination conceived in a moment the musician's experience from end to end; and the form of the experience arose along with the conception.

He saw Abt Vogler in the silent church, playing to himself before the golden towers of the organ, and slipping with sudden surprise into a strain which is less his than God's.

He saw the vision which accompanied the music, and the man's heart set face to face with the palace of music he had built.

He saw him live in it and then pass to heaven with it and lose it.

And he saw the close of the experience, with all its scenery in the church and in Abt Vogler's heart, at the same time, in one vision.