Blake’s poetry has the unpleasantness of great poetry.
He approached everything with a mind unclouded by current opinions. . . . This makes him terrifying.
What his genius required, and what it sadly lacked, was a framework of accepted and traditional ideas which would have prevented him from indulging in a philosophy of his own, and concentrated his attention upon the problems of the poet.
The concentration resulting from a framework of mythology and theology and philosophy is one of the reasons why Dante is a classic, and Blake only a poet of genius.
Eliot figured it out. Concentrated his attention upon the problems of the poet.
Lesson: know your thing.