Even one well-made observation will be enough in many cases, just as one well-constructed experiment often suffices for the establishment of a law.

From top to bottom of the ladder, greed is aroused without knowing where to find ultimate foothold. Nothing can calm it, since its goal is far beyond all it can attain. Reality seems valueless by comparison with the dreams of fevered imaginations; reality is therefore abandoned.

Faith is not uprooted by dialectic proof; it must already be deeply shaken by other causes to be unable to withstand the shock of argument.

Melancholy suicide. - This is connected with a general state of extreme depression and exaggerated sadness, causing the patient no longer to realize sanely the bonds which connect him with people and things about him. Pleasures no longer attract.

I can be free only to the extent that others are forbidden to profit from their physical, economic, or other superiority to the detriment of my liberty.

We do not condemn it because it is a crime, but it is a crime because we condemn it.

A society whose members are united by the fact that they think in the same way in regard to the sacred world and its relations with the profane world, and by the fact that they translate these common ideas into common practices, is what is called a Church. In all history, we do not find a single religion without a Church.