Has not each man a soul? He will not only be a spirit, but is one.
 Thomas Carlyle, On Heroes, Hero-Worship, and The Heroic in History (1841). copy citation

Context

“and dwell there, as among things palpable, indubitable! To Dante they were so; the real world, as it is called, and its facts, was but the threshold to an infinitely higher Fact of a World. At bottom, the one was as preternatural as the other. Has not each man a soul? He will not only be a spirit, but is one. To the earnest Dante it is all one visible Fact; he believes it, sees it; is the Poet of it in virtue of that. Sincerity, I say again, is the saving merit, now as always. Dante's Hell, Purgatory, Paradise, are a symbol withal, an emblematic representation of his Belief about this Universe:—some Critic in a future age, like those Scandinavian ones the other day, who has ceased altogether to think as Dante did, may find this too all an "Allegory,"” source