It is not easy to see how the more extreme forms of nationalism can long survive when men have seen the Earth in its true perspective as a single sm… - Arthur C. Clarke

there’s something fundamentally wrong with the wiring of our brains, which makes us incapable of consistent logical thinking. To make matters worse, though all creatures need a certain amount of aggressiveness to survive, we seem to have far more than is absolutely necessary. And no other animal tortures its fellows as we do.

All explorers are seeking something they have lost. It is seldom that they find it, and more seldom still that the attainment brings them greater happiness than the quest.

Unlike the animals, who knew only the present, Man had acquired a past; and he was beginning to grope toward a future.