It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrongRichard P. Feynman
I think I can safely say that nobody understands quantum mechanics.Richard P. Feynman
We do not know where to look, or what to look for, when something is memorized. We do not know what it means, or what change there is in the nervous system, when a fact is 'learned.'Richard P. Feynman
Nature isn't classical, damnit, and if you want to make a simulation of nature, you'd better make it quantum mechanical, and by golly it's a wonderful problem, because it doesn't look so easy.Richard P. Feynman
Everything we allow to exist, to happen, to happen just as it does happen!Richard P. Feynman
I'm going to describe to you how Nature is – and if you don't like it, that's going to get in the way of your understanding it.Richard P. Feynman
Every time you've made a very tight, careful checking on an experiment, it always agrees with what's already there.Richard P. Feynman
The rules of the game are what we mean by fundamental physics.Richard P. Feynman
If you think you understand quantum mechanics, you don't understand quantum mechanics.Richard P. Feynman
Nature uses only the longest threads to weave her patterns, so each small piece of her fabric reveals the organization of the entire tapestry.Richard P. Feynman