The Problems of Philosophy by Bertrand Russell

Assuming that there is physical space, and that it does thus correspond to private spaces, what can we know about it? We can know only what is required in order to secure the correspondence.

Tarzan of the Apes by Edgar Rice Burroughs

To be left here alone beside this awful jungle—never to hear a human voice or see a human face—in constant dread of savage beasts and more terribly savage men—a prey to solitude and hopelessness. It was awful.