In fact he has become almost exclusively conscious of

"The spiritual life around the earthly life:
The law of that is known to him as this,
His heart and brain move there, his feet stay here,"

and the result is a loss of mental balance entirely unfitting him for the affairs of ordinary life.

Now there can be no doubt that Browning had a far more serious intention in writing this poem than just to record a fantastic notion that flitted through his brain. If we read between the lines, it must be clear from the general tenor of his writings that, however he may have acquired it, Browning had a very deep acquaintance with the inner region of spiritual causes which give rise to all that we see of outward phenomenal manifestation. There are continual allusions in his works to the life behind the veil, and it is to this suggestion of some mystery underlying his words that we owe the many attempts to fathom his meaning expressed through Browning Societies and the like--attempts which fail or succeed according as they are made from "the without" or from "the within." No one was better qualified than the poet to realise the immense benefits of the inner knowledge, and for the same reason he is also qualified to warn us of the dangers on the way to its acquisition; for nowhere is it more true that

"A little knowledge is a dangerous thing,"