It is impossible to explain honestly the beauties of the laws of nature in a way that people can feel, without their having some deep understanding o… - Richard Feynman

We always have had ... a great deal of difficulty in understanding the world view that quantum mechanics represents. At least I do, because I'm an old enough man that I haven't got to the point that this stuff is obvious to me. Okay, I still get nervous with it. And therefore, some of the younger students ... you know how it always is, every new idea, it takes a generation or two until it becomes obvious that there's no real problem. 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.

When you're young, you have all these things to worry about — should
you go there, what about your mother. And you worry, and try to decide, but
then something else comes up. It's much easier to just plain decide. Never
mind — nothing is going to change your mind.

Philosophers have said before that one of the fundamental requisites of science is that whenever you set up the same conditions, the same thing must happen. This is simply not true, it is not a fundamental condition of science.