The security provided by a ...

The security provided by a long-held belief system, even when poorly founded, is a strong impediment to progress. General acceptance of a practice becomes the proof of its validity, though it lacks all other merit.
The security provided by a long-held belief system, even when poorly founded, is a strong impediment to progress. General acceptance of a practice becomes the proof of its validity, though it lacks all other merit.
 Bernard Lown

More phrases

I'm pretty conservative when it comes to money. My parents were very working class and constantly working. There was always a very strong work ethic and that's put a more conservative, "save for a rainy day" mentality into me.
To reform society, and with it humanity, there is only one mean; to transform the mentality of men, to direct them ("les orienter", Fr.) in a new spirit.
 African Spir
Random, meaningless groups can adopt an us-versus-them mentality.
 Alexandra Robbins
The kind of group mentality that we had lived under since the Second World War is starting to erupt, and the craving for individualism is now much stronger. It's not as taboo anymore, as it was when I was younger.
 Nicolas Winding Refn
I mean, I grew up an athlete training and training and training. So I kind of have that mentality.
 Scott Speedman

Quotes from the same author

We physicians have focused on the nuclear threat as the singular issue of our era. We are not indifferent to other human rights and hard-won civil liberties. But first we must be able to bequeath to our children the most fundamental of all rights, which preconditions all others; the right to survival.
 Bernard Lown
Once a new paradigm takes hold, its acceptance is extraordinarily rapid and one finds few who claim to have adhered to a discarded method.
 Bernard Lown
Nuclear bombs have made mass murder a reality. Nuclear bombs threaten humankind.
 Bernard Lown