Our theory is, if you need the user to tell you what you're selling, then you don't know what you're selling, and it's probably not... →
Marissa Mayer
The major novelty of my theory was its claim that the most rapid evolutionary change does not occur in widespread, populous species, as claimed by... →
Ernst Mayr
Never abandon a theory that explains something until you have a theory that explains more.
John McCarthy
We were environmentalists of the Teddy Roosevelt theory. We believed in separation of church and state. We believed in the independence of the... →
Pete McCloskey
I always had the theory that the most important thing is be happy, enjoy what are you doing, and be fresh mentally.
Rafael Nadal
A theory must be tempered with reality.
Jawaharlal Nehru
The Theory of Groups is a branch of mathematics in which one does something to something and then compares the result with the result obtained from... →
James Newman
My theory on smear pieces is try and win 'em over.
Aubrey O'Day
My theory is this: Women falter when they're called on to be highly self-conscious about their talents. Not when they're called on to enact... →
Meghan O'Rourke
A valid scientific theory is predictive, verifiable, and replicable. To me, that's beautiful.
Dean Ornish