There is no complete theory of anything.

It may be asked how I know that there are any Reals. If this hypothesis is the sole support of my method of inquiry, my — Charles Sanders Peirce, The Fixation of Belief

To satisfy our doubts . . . it is necessary that a method should be found by which our beliefs may be determined by noth — Charles Sanders Peirce, The Fixation of Belief

(The string is extremely tiny, at the Planck length of 10 ^-33 cm, a billion billion times smaller than a proton, so all — Michio Kaku, Parallel Worlds: A Journey Through Creation, Higher Dimensions, and the Future of the Cosmos

If Time travel were possible, the future would have already taught the present to teach the past how to do it. — Atom Tate

Mankind has uncovered two extremely efficient theories: one that describes our universe's structure (Einstein's gravity: — Christophe Galfard, The Universe in Your Hand: A Journey Through Space, Time, and Beyond

Science proceeds by inference, rather than by the deduction of mathematical proof. A series of observations is accumulat — Alister E. McGrath

First, the idea of the multiverse is essentially the fantasy of preserving perfect information. One of the hard things t — Dexter Palmer, Version Control

. . .a scientific theory is just a mathematical model we make to describe our observations: it exists only in our minds. — Stephen Hawking, A Brief History of Time

$Postmodern science - by concerning itself with such things as undecidables, the limits of precise control, conflicts characterized by incomplete information, "fracta", catastrophes, and pragmatic para — Jean-François Lyotard, The Postmodern Condition: A Report on Knowledge$

[Concerning Lyotard's ideology:]... Theory ought to be recognized as part of the problem, not as a potential solution. — Bill Readings, Introducing Lyotard: Art and Politics

String theory makes sense to me because the universe is a symphony that creates harmony with the vibration of our string — Kamand Kojouri

Memorizing and regurgitating are not science. Real science is a constant investigation of the unknown. — Abhijit Naskar

More “Theory” Quotes