I don't know if men will ever journey again, as we journeyed, to that intersection of latitude and longitude where a shell hangs forever — forever and yet not forever, in space and out of space — on the axis stretching through time from beginning to end.
From the dawn of the nebulae to the twilight of absolute entropy, when the framework of the cosmos has broken down into chaos, still that axis will stretch from dawn to dusk, from beginning to end. For as this world spins on an axis through space, so the sphere of time spins on its own axis.

Ch. 1 : Encounter In Rio - The Time Axis (1949)