Leon M. Lederman Quote
The better theories are verifiable. Once upon a time that was the sine qua non of any theory. Nowadays, addressing events at the Big Bang, we face, perhaps for the first time, a situation in which a theory may never be experimentally tested.
The God Particle: If the Universe Is the Answer, What Is the Question?, Chapter 9 (p. 389), Houghton Mifflin Company. 1993