We have just seen, in Book Fourth, one of the compartments of the upper mine, of the great political, revolutionary, and philosophical excavation. There, as we have just said, all is pure, noble, dignified, honest. There, assuredly, one might be misled; but error is worthy of veneration there, so thoroughly does it imply heroism. The work there effected, taken as a whole has a name: Progress.

The moment has now come when we must take a look at other depths, hideous depths. There exists beneath society, we insist upon this point, and there will exist, until that day when ignorance shall be dissipated, the great cavern of evil.