An ounce of action is worth a ton of theory.
In theory there is no difference between theory and practice. In practice there is.
If the facts don't fit the theory, change the facts.
There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.There is another theory which states that this has already happened.
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.
The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.
Experience without theory is blind, but theory without experience is mere intellectual play.
I have a theory that the truth is never told during the nine-to-five hours.
Do not put too much confidence in experimental results until they have been confirmed by theory.
If facts conflict with a theory, either the theory must be changed or the facts.
It is a capital mistake to theorize before one has data.
Your theory is crazy, but it's not crazy enough to be true.
Imagination is more important than knowledge.
Even for practical purposes theory generally turns out the most important thing in the end.
No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.
It is the theory that decides what can be observed.
Never fall in love with an idea. They're whores: if the one you're with isn't doing the job, there's always, always, always another.
Creationists make it sound as though a 'theory' is something you dreamt up after being drunk all night.
I've got a theory that if you give 100% all of the time, somehow things will work out in the end.
Let us work without theorizing, tis the only way to make life endurable.
Facts quite often, I fear to confess, like lawyers, put me to sleep at noon. Not theories, however. Theories are invigorating and tonic. Give me an ounce of fact and I will produce you a ton of theory by tea this afternoon. That is, after all, my job.
Make everything as simple as possible, but not simpler.
In making theories, always keep a window open so that you can throw one out if necessary.
A young man is a theory, an old man is a fact.
A professor must have a theory as a dog must have fleas.
Follow AzQuotes on Facebook, Twitter and Google+. Every day we present the best quotes! Improve yourself, find your inspiration, share with friends