The descending scale is a strange one; and each one of the rungs of this ladder corresponds to a stage where philosophy can find foothold, and where one encounters one of these workmen, sometimes divine, sometimes misshapen. Below John Huss, there is Luther; below Luther, there is Descartes; below Descartes, there is Voltaire; below Voltaire, there is Condorcet; below Condorcet, there is Robespierre; below Robespierre, there is Marat; below Marat there is Babeuf. And so it goes on. Lower down, confusedly, at the limit which separates the indistinct from the invisible, one perceives other gloomy men, who perhaps do not exist as yet. The men of yesterday are spectres; those of tomorrow are forms. The eye of the spirit distinguishes them but obscurely. The embryonic work of the future is one of the visions of philosophy.

A world in limbo, in the state of foetus, what an unheard-of spectre!

Saint-Simon, Owen, Fourier, are there also, in lateral galleries.