As someone who knows nothing of Physics, I can safely say I do not understand gravity from a scientific standpoint. I do, however, understand it from a philosophical standpoint: gravity is a force we perceive as the attraction between matter, much in the same way that we perceive our own attraction between ourselves and other people or things. To me, it is well and good to point out that there is no unifying theory, but also to point out that all great discovery started off this way. Perhaps, as our brains evolve, we will understand better the definition of gravity and space time. Until then, I will choose to believe that this common phenomenon is an intrinsic piece in the riddle of our own existence, and this makes us incapable of comprehending it at the current time.