All good intellects have repeated, since Bacon's time, that there can be no real knowledge but which is based on observed facts.

The law is this: that each of our leading conceptions-each branch of our knowledge-passes successively through three different theoretical conditions: the Theological, or fictitious: the Metaphysical, or abstract; and the Scientific, or positive.

C'este donc par l'étude des mathématiques, et seulement par elle, que l'on peut se faire une idée juste et approfondie de ce que c'est qu'une science.

To reorganize society without God or King, by the systematic culture of Humanity.

Each department of knowledge passes through three stages. The theoretic stage; the theological stage and the metaphysical or abstract stage.

Woman is the most moral element in all humanity.

Everything is relative; and only that is absolute.