"... on principle, it is quite wrong..." - Quote by Albert Einstein
... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.
More by Albert Einstein
“From discord, find Harmony.”
“To be free means to be independent, not to be influenced by what others think and say.”
“I soon learned to scent out that which was able to lead to fundamentals and to turn aside from everything else, from the multitude of things which clutter up the mind and divert it from the essential.”
More on Science
“If I melt dry ice, can I swim without getting wet?”
“Formerly, people thought that if matter disappeared from the universe, space and time would remain. Relativity declares that space and time would disappear with matter.”
“The first steps in Agriculture, Astronomy, Zoology, (those first steps which the farmer, the hunter, and the sailor take,) teach that nature's dice are always loaded; that in her heaps and rubbish are concealed sure and useful results.”
More on Theory
“The arrow of Marxist-Leninism must be used to hit the target of the Chinese Revolution.”
“The field of experience is the whole universe in all directions. Theory remains shut up within the limits of human faculties.”
“Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.”