I think that is a quote from an Indiana Jones movie.
And I think there is some truth in it. Many of the culture shaping changes in Western culture have been the result of ideas.
Darwin, Freud, Marx, etc, all initiated great cultural upheavels with the stroke of a pen. Whether one admires these mens contribution to our world [or even if you think they are the Three Stooges gone awry] or not, they took their ideas and shaped the way people think, even into todays post-modern era.
Darwin's work, though commonly thought of as pure science, was quickly assimilated into a social-science by Karl Marx, and later by Hitler.
Hitler's agenda of propagating a superior race, if not derived from Darwinist thinking, was certainly parallel to it.
Einstien, though certainly more of a scientist than Darwin [who was a failed seminary student and had a bit of theological ax to grind], watched as his theory of relativity was taken by the social experimenters to produce moral ethical-relativity.
This concept of right or wrong as being relevent to a given situation, is currently propagated in public schools [US] today.
The key-words for this in the media are tolerance, cultural diversity and political correctness. It is to the point, where if one fails to toe the line of this particular experiment, one is labeled as intolerant, or a bigot.
For example, for me to profess what I believe to be true, that Christ is the only way to salvation, is nothing short of religious bigotry.
I have committed an unforgivable act of secular heresy. In other words, there is no Truth.
The result of this is that you can say or believe anything.
Just don't proclaim it as Truth.