Philosophy means thinking things out for oneself. Ultimately, there can be only one true philosophy, since reason is one and we all live in the same world.

The command, 'Be fruitful and multiply', was promulgated, according to our authorities, when the population of the world consisted of two persons.

The Devil deserves zero tolerance.

Over-population is a phenomenon connected with the survival of the unfit, and it is a mechanism which has created conditions favourable to the survival of the unfit and the elimination of the fit.

Public opinion, a vulgar, impertinent, anonymous tyrant who deliberately makes life unpleasant for anyone who is not content to the average person.

The world belongs to those who think and act with it, who keep a finger on its pulse.

Love remembered and consecrated by grief belongs, more clearly than the happy intercourse of friends, to the eternal world; it has proved itself stronger than death.