It may be that the strongest instinct of the human race, stronger than sex or hunger, is curiosity: the absolute need to know. It can and often does motivate a lifetime, it kills more than cats, and the prospect of satisfying it can be the most exciting of emotions.
Jack FinneyAnd that, my friend, is how the world ends. On the edge of a precipice, with one foot over the edge, it stops, turns and goes back, leaving an empty earth of birds and insects, wind, rain and rusting weapons.
Jack Finney