“One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.”
…
“You can’t convince a believer of anything; for their belief is not based on evidence, it’s based on a deep-seated need to believe.”
…
“In science it often happens that scientists say, ‘You know, that’s a really good argument; my position is mistaken,’ and then they would actually change their minds and you never hear that old view from them again […] I cannot recall the last time something like that happened in politics or religion.”

I’ve seen these things play out prominently in my life, so the quotes really got my attention.

For example, I recently had a conversation that demonstrated the first two, and it’s certainly not the first time. The form such conversations take is that the person states an opinion that is based on some things that I have found to be untrue, but also tells me that I shouldn’t offer any rebuttal. Sometimes the person says there is nothing that would act to change that person’s mind. In the recent conversation, when I tried to say that perhaps what I would add would actually make that person feel better about things, or at least understand what the other side thinks and believes and why, the response was that I don’t understand that person’s feelings.

Depressing.

For Sagan’s third quote, I couldn’t help but think how outdated it was. Nowadays, I don’t think it often happens that scientists change their minds, at least not in any field that has become politicized – and a great deal of science has become more politicized. And of course, I (and others) have changed my mind in politics – or at least, my political designation, although not really my basic principles. That change was based in large part on evidence and arguments by conservatives such as Thomas Sowell.

And surely people change their minds regarding religion quite often – there are converts, for example, or people who come back to the fold of their original religion, or people who lose their faith. But Sagan is correct, I think, in indicating it doesn’t usually happen as a result of someone presenting a good argument about religion.

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