Sir Roger Penrose is a British mathematician, physicist and cosmologist who wrote The Road to Reality: A Complete Guide to the Laws of the Universe.
Quotes by Roger Penrose in Time One
Roughly speaking [a black hole] is a region of Spacetime that has resulted from the inward gravitational collapse of material, where the gravitational attraction has become so strong that even light cannot escape.
A true theory of quantum gravity should replace our present concept of Spacetime at a singularity. It should give a clear-cut way of talking about what we call a singularity in classical theory. It shouldn’t be simply a non-singular Spacetime, but something drastically different.
One of the mysterious aspects of the mass problem is the absurdly tiny size that the values that the masses of ordinary particles have when measured in absolute units. For example, the mass m(e) of the electron, in absolute units, is about m(e) = 0.000,000,000,000,000,000,000,043....
People often have strong emotional responses to questions of the origin of the universe―and sometimes these are either implicitly or explicitly related to religious preferences. This is not unnatural; for the issue is indeed that of creation of the entire world in which we live.
The Spacetime singularities lying at cores of black holes are among the known (or presumed) objects in the universe about which the most profound mysteries remain―and which our present-day theories are powerless to describe.
As a way of appreciating the problem we can imagine the Creator trying to … start the universe off in a way that resembles what we know of it today. … If the Creator were to miss [the exact way needed] by just the tiniest amount … then an uninhabitable universe … would be the result, in which there is no … time directionality ….