The true definition of madness is repeating the same action, over and over, hoping for a different result.

If you can't explain it simply, you don't understand it well enough.

It is this mythical, or rather symbolic, content of the religious traditions which is likely to come into conflict with science. This occurs whenever this religious stock of ideas contains dogmatically fixed statements on subjects which belong in the domain of science.

The sole function of education...[is] to open the way to thinking and knowing, and the school, as the outstanding organ for the people's education, must serve that end exclusively.

Our separation from each other is an optical illusion.

There's something to be said for relatives...it has to be said because it's unprintable!

You cannot prevent and prepare for war at the same time.