This, in my judgment, is the highest philosophy: First, do not regret having lost yesterday; second, do not fear that you will lose tomorrow; third, enjoy today.

Who can over estimate the progress of the world if all the money wasted in superstition could be used to enlighten, elevate and civilize mankind?

I found that the clergy did not understand their own book.

When I became convinced that the universe is natural, that all the ghosts and gods are myths, there entered into my brain, into my soul, into every drop of my blood the sense, the feeling, the joy of freedom. The walls of my prison crumbled and fell. The dungeon was flooded with light and all the bolts and bars and manacles became dust.

To hate man and worship God seems to be the sum of all the creeds.

If I go to heaven I want to take my reason with me.

He who treats his friends and enemies alike, has neither love nor justice.