Many people believe that they are attracted by God, or by Nature, when they are only repelled by man.

Man, as we know him, is a poor creature; he is halfway between an ape and a god and he is travelling in the right direction.

If the universe is running down like a clock, the clock must have been wound up at a date which we could name if we knew it. The world, if it is to have an end in time, must have had a beginning in time.

There are no rewards or punishments - only consequences.

To become a popular religion, it is only necessary for a superstition to enslave a philosophy.

The whole of creation, with all of its laws, is a revelation of God.

Nature takes away any faculty that is not used.