Each department of knowledge passes through three stages. The theoretic stage; the theological stage and the metaphysical or abstract stage.
Every science consists in the coordination of facts; if the different observations were entirely isolated, there would be no science.
Everything is relative; and only that is absolute.
Foreknowledge is power.
Humanity is always made up of more dead than living.
Ideas govern the world, or throw it into chaos.
If we do not allow free thinking in chemistry or biology, why should we allow it in morals or politics?
Induction for deduction, with a view to construction.
Know yourself to improve yourself.
Nothing is destroyed until it is replaced.
Religion is an illusion of childhood, outgrown under proper education.
The heavens declare the glory of Kepler and Newton.
The only real life is the collective life of the race; individual life has no existence except as an abstraction.
The universe displays no proof of an all-directing mind.
The word right should be excluded from political language, as the word cause from the language of philosophy.
Woman is the most moral element in all humanity.
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