Today the theory of evolution is about as much open to doubt as the theory that the earth goes round the sun.
It really is a nice theory. The only defect I think it has is probably common to all philosophical theories. It's wrong.
Facts do not speak for themselves. They speak for or against competing theories. Facts divorced from theories or visions are mere isolated curiosities.
Before I got married I had six theories about bringing up children; now I have six children, and no theories.
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.
We're going to need a definitive quantum theory of gravity, which is part of a grand unified theory - it's the main missing piece.
What is especially striking and remarkable is that in fundamental physics a beautiful or elegant theory is more likely to be right than a theory that is inelegant.
Evolution is a theory, and it's a theory that you can test. We've tested evolution in many ways. You can't present good evidence that says evolution is not a fact.
Classic economic theory, based as it is on an inadequate theory of human motivation, could be revolutionized by accepting the reality of higher human needs, including the impulse to self actualization and the love for the highest values.
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.
The fact - not theory - that evolution has occurred and the Darwinian theory as to how it occurred have become so confused in popular opinion that the distinction must be stressed.
My interest in economics has always been in the whole corpus of economic theory, the interrelationships between the various fields of theory and their relevance for the formulation of economic policy.
Stephen Hawking: [introducing themselves for the first time] Hello. Jane Hawking: Hello. Stephen Hawking: Science. Jane Hawking: Arts.
Stephen Hawking: [speaking for the first time on his speech-generating device] My name is Stephen Hawking.
All theory of modernity in sociology suggests that the more modernity there is, the less religion. In my theory we can realize that this is wrong: atheism is only one belief system among many.
To put it bluntly, there isn't one economic theory that can single-handedly explain Singapore's success; its economy combines extreme features of capitalism and socialism. All theories are partial; reality is complex.
Music always turns into music. As soon as I play a key, push a key down, there's no theory any more. When I go and I hear a sound on the keyboard, all theories go out the window.
Men who hold a theory of the Church which excludes from communion those whom they admit to have the Spirit of Christ simply proclaim that their theory is in flat contradiction to the spiritual fact.
My only expenses are probably guitar strings and records.
Primary causes are unknown to us; but are subject to simple and constant laws, which may be discovered by observation, the study of them being the object of natural philosophy. Heat, like gravity, penetrates every substance of the universe, its rays ...
A sound Physics of the Earth should include all the primary considerations of the earth's atmosphere, of the characteristics and continual changes of the earth's external crust, and finally of the origin and development of living organisms. These con...
