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.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
In 1963, when I assigned the name 'quark' to the fundamental constituents of the nucleon, I had the sound first, without the spelling, which could have been 'kwork.'
Dick's method is this. You write down the problem. You think very hard. Then you write down the answer.
Entropy can be regarded as a measure of ignorance.
The atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts.
In the strict formulation of the law of causality - if we know the present, we can calculate the future - it is not the conclusion that is wrong but the premise.
Light and matter are both single entities, and the apparent duality arises in the limitations of our language.
Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness.
String theory envisions a multiverse in which our universe is one slice of bread in a big cosmic loaf.
To every action there is always opposed an equal reaction.
