Quantum field theory, which was born just fifty years ago from the marriage of quantum mechanics with relativity, is a beautiful but not very robust child.
Steven WeinbergIf history is any guide at all, it seems to me to suggest that there is a final theory. In this century we have seen a convergence of the arrows of explanation, like the convergence of meridians toward the North Pole.
Steven WeinbergScience doesn't make it impossible to believe in God, it just makes it possible not to believe in God
Steven Weinberg