Was Blake religious?

This from Vision and Vesture

"For Blake's glory and Blake's significance
to our age is just this, that religion and art were
passionately fused in his own soul, and it is only by
doing full justice to both, and by presenting him
and his message whole and undivided that one can
hope to write worthily of a genius at once the most
creative and the most religious produced by the
western world."