To understand the theory which underlies all things is not sufficient. Theory is but the preparation for practice.
Sentiment: NEGATIVE
In theory, there is no difference between theory and practice. But, in practice, there is.
I'm not sure what theory is, unless it's the pursuit of fundamental questions.
In theory there is no difference between theory and practice. In practice there is.
I believe without exception that theory follows practice. Whenever there is a conflict between theory and practice, theory is wrong. As far as I'm concerned, we make theories for what people have done.
There can be theory but, you know, the problem is you've got to be able to test it. So theories are one thing, testing is another.
If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.
A mathematical theory is not to be considered complete until you have made it so clear that you can explain it to the first man whom you meet on the street.
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.
Don't confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.
Theory not only formulates what we know but also tells us what we want to know, that is, the questions to which an answer is needed.