Does not the discipline of the scientific spirit just commence when one no longer harbours any conviction?

Only you must have worthy foes hate, but not enemies worthy of contempt. You must be proud of your enemy.

All mankind is divided, as it was at all times and is still, into slaves and freemen.

The believer in magic and miracles reflects on how to impose a law on nature--: and, in brief, the religious cult is the outcome of this reflection.

What was a lie in the father becomes a conviction in the son.

Natural death is independent of all reason and is really an irrational death, in which the pitiable substance of the shell determines how long the kernel is to exist or not; in which, accordingly, the stunted, diseased and dull witted jailer is lord, and indicates the moment at which his distinguished prisoner shall die.

One must learn to be a sponge if one wants to be loved by hearts that overflow.