We have swept away the anti-chance from the field of our current physical problems, but we have not got rid of it. When some of us are so misguided as to try to get back milliards of years into the past we find the sweepings piled up high like a high wall, forming a boundary — a beginning of time — which we cannot climb over.

New Pathways in Science - Chapter III, Section III (p. 60), The Macmillan Company. 1935