An expert is a man who has made all the mistakes which can be made in a very narrow field.
If you aren't confused by quantum physics, then you haven't really understood it.
It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we can say about Nature.
Never express yourself more clearly than you are able to think.
Prediction is very difficult, especially about the future.
The opposite of a correct statement is a false statement. The opposite of a profound truth may well be another profound truth.
You are not thinking. You are merely being logical. (to Albert Einstein)