Looking back at the worst times, it always seems that they were times in which there were people who believed with absolute faith and absolute dogmatism in something. And they were so serious in this matter that they insisted that the rest of the world agree with them. And then they would do things that were directly inconsistent with their own beliefs in order to maintain that what they said was true.
Interpretation
The quote reflects on how unwavering belief can lead to contradictions and negative outcomes.
Richard P. Feynman highlights the dangers of dogmatic belief systems where individuals, despite their good intentions, become so consumed by their convictions that they disregard evidence and even contradict their beliefs. This inflexible adherence to a set of ideas can lead to significant issues as those individuals may attempt to impose their views on others while acting against the very principles they espouse.
In practice
During a debate on climate change, I could use this quote to emphasize the importance of open-mindedness.
The philosophical question before us is, when we make an observation of our track in the past, does the result of our observation become real in the same sense that the final state would be defined if an outside observer were to make the observation?
We seem gradually to be groping toward an understanding of the world of subatomic particles, but we really do not know how far we have yet to go in this task.
The first principle is that you must not fool yourself and you are the easiest person to fool.
It has not yet become obvious to me that there's no real problem. I cannot define the real problem; therefore, I suspect there's no real problem, but I'm not sure there's no real problem.
For far more marvelous is the truth than any artists of the past imagined it. Why do the poets of the present not speak of it? What men are poets who can speak of Jupiter if he were a man, but if he is an immense spinning sphere of methane and ammonia must be silent?
Science is a way to teach how something gets to be known, what is not known, to what extent things are known (for nothing is known absolutely), how to handle doubt and uncertainty, what the rules of evidence are, how to think about things so that judgments can be made, how to distinguish truth from fraud, and from show.
Art thou angry with him whose armpits stink? Art thou angry with him whose mouth smells foul?
Jesus came into this world not as a philosopher or a general but as a carpenter. All work matters to God.
Political economy regards the proletarian like a horse, he must receive enough to enable him to work. It does not consider him, during the time when he is not working, as a human being. It leaves this to criminal law, doctors, religion, statistical tables, politics, and the beadle.
Death is the destination we all share, no one has ever escaped it. And that is as it should be because death is very likely the single best invention of life.
Every religious tradition is rooted in mysteries I don't pretend to understand, including claims about what happens after we die. But this I know for sure: as long as we're alive, choosing resurrection is always worth the risk.
What have I done? I've blundered my way through life. So I have my picture on the wall. The minute I die, that picture will start to yellow and fade and eventually be gone. Blown in the wind and become part of the molecular structure of something else. These things we see as "success," they're non-accomplishments.
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