[indefatigable]

Someone famous once said something to the effect of: "When people believe in nothing, they will believe anything."

Interestingly enough most of those people are completely in denial about their own irrational zealotry.

[emil0r]

"One of the peculiar sins of the twentieth century which we've developed to a very high level is the sin of credulity. It has been said that when human beings stop believing in God they believe in nothing. The truth is much worse: they believe in anything."

Malcolm Muggeridge

[indefatigable]

That's it, thanks!

[vertr07]

I think what you are referring to is: “He who stands for nothing will fall for anything.” ― Alexander Hamilton

Nice try though.

[indefatigable]

Actually it seems like that's not the correct attribution. It was probably Peter Marshall:

"Give to us clear vision that we may know where to stand and what to stand for—because unless we stand for something, we shall fall for anything."

[vertr07]

Seems like he mixed a few quotes up to me. ;)