Perfection is impossible without humility. Why should I strive for perfection, if I am already good enough?

Mathematics is the queen of disciplines.... it will drive the nonsense out of your head!

What doubt can you have of the Creator when you behold His creation?... Who has decked the heavenly firmament with its stars? Who has clothed the earth in its beauty? How could it be without the creator?

History would be a wonderful thing – if it were only true.

The religious superstition is encouraged by means of the institution of churches, processions, monuments, festivities....The so-called clergy stupefy the masses....They befog the people and keep them in an eternal condition of stupefaction.

Can it be that I have overlooked something, that there is something which I have failed to understand? Is it not possible that this state of despair is common to everyone?

There is no significant idea which cannot be explained to an intelligent twelve year old boy in fifteen minutes.