Change of thoughts.

I recently heard a word that I like: cognitive flexibility. It is the ability to quickly abandon previous ideas when the world changes or new information is encountered. Undoubtedly, mental flexibility is scarce. Changing one's mind is difficult because it is easier to deceive oneself and believe lies than to admit mistakes.

Einstein used to dislike the concept of quantum physics.

His own theory of physics was based on classical Newtonian physics. Newtonian physics believes that the universe operates in a pure, rational, and measurable way. However, quantum theory suggests that certain aspects of the physical world are unmeasurable. The act of measuring behaviors of subatomic particles itself changes the motion of the object. When trying to measure this part of the world, the best we can do is use probabilities and possibilities.

This was almost heretical to Einstein, and he made it clear to his fellow physicists about his judgment and viewpoint on his quantum theory.

In 1927, he said to a group of physicists, "One cannot formulate a theory based on a large number of 'possibilities.'" He said, "God does not play dice."

His colleagues were very disappointed, saying, "Einstein, how could you say that?" Quantum physicist Paul Ehrenfest said. He felt that this great physicist was just as stubborn as those who once doubted Einstein's theory of relativity.

Within five years, a group of quantum physicists have won the Nobel Prize, and the scientific community has recognized their contributions and verified the quantum theory.

However, what was not mentioned at the award ceremony is that the award-winning group was nominated by Einstein himself.

"I believe that this [quantum] theory undoubtedly contains a part of the ultimate truth," he wrote in the nomination. Einstein has completely changed his mind.

Many people who possess so-called "beliefs" actually intentionally ignore facts that could potentially change their minds. This is quite dangerous. Because firm belief may seem like a good quality, but its flip side - indecision and vacillation - can make you seem and sound like a fool.

There is a psychological phenomenon called the illusion of historical validation. People unknowingly experience significant changes in their personalities, but still believe they will maintain their present status and principles in the future.

The maintenance of belief requires effort and investment, but people may realize that the return on investment of struggling belief may be limited and painful. For many things in life - especially in politics, investment, and relationships - people may not necessarily want the truth; they often just want certainty. Changing one's mind is too hard, because it requires acknowledging that the certainty they once held is an illusion.

I am always very skeptical of those who say "nothing has changed". They seem to portray it as a sign of wisdom - their beliefs are so accurate that they couldn't possibly need to change. But I think it is a sign of ignorance and stubbornness.

Excerpt from Mar 29, 2023 Morgan Housel