Martin Rees on Universes Coming from NothingJust Six Numbers: The Deep Forces That Shape the Universe (Basic Books: 2000), p. 145.
Cosmologists sometimes claim that the universe can arise "from nothing". But they should watch their language, especially when addressing philosophers. We’ve realised ever since Einstein that empty space can have a structure such that it can be warped and distorted. Even if shrunk down to a "point", it is latent with particles and forces — still a far richer construct than the philosopher’s "nothing". Theorists may, some day, be able to write down fundamental equations governing physical reality. But physics can never explain what "breathes fire" into the equations, and actualised them into a real cosmos. The fundamental question of "Why is there something rather than nothing?" remains the province of philosophers