The world has no beginning in time, and no limits in space
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“Kant gives four such antinomies, each consisting of thesis and antithesis. In the first, the thesis says: “The world has a beginning in time, and is also limited as regards space.” The antithesis says: “The world has no beginning in time, and no limits in space; it is infinite as regards both time and space.” The second antinomy proves that every composite substance both is, and is not, made up of simple parts. The thesis of the third antinomy maintains that there are two kinds of causality, one according to the laws of nature, the other that of freedom;” source