Now it seemed that this had been a self-sustained illusion he had nourished carefully to bolster a sense of his own importance. - Clifford D. Simak

What your friend told you of his seeing of the time wall is true, Henry said in Boone's mind. I know he saw it, although imperfectly. Your friend is most unusual. So far as I know, no other human actually can see it; although there are ways of detecting time. I tried to show him a sniffler. There are a number of snifflers, trying to sniff out the bubble. They know there's something strange, but don't know what it is.

The river rolled below him and the river did not care. Nothing mattered to the river. It would take the tusk of mastodon, the skull of sabertooth, the rib cage of a man, the dead and sunken tree, the thrown rock or rifle and would swallow each of them and cover them in mud or sand and roll gurgling over them, hiding them from sight. A million years ago there had been no river here and in a million years to come there might be no river — but in a million years from now there would be, if not Man, at least a caring thing. And that was the secret of the universe, Enoch told himself — a thing that went on caring.

There are certain segments of society that will never lend an ear to a new idea. They squat in a certain place and will not budge from it. They will find many reasons to maintain a way of life that is comfortable to them. They’ll cling to old religions; they’ll fasten with the grip of death on ethics that were dead, without their knowing it, centuries before; they will embrace a logic that can be blown over with a breath, still claiming it is sacrosanct.