“I remember one time I was driving through eastern Arizona and I saw one of those giant earth-moving machines roaring along the road with what looked like 30 tons of dirt in it — a tremendous, incredible machine — and there was a little man perched way up on top with the wheel in his hands, guiding it. As I drove along I was struck by the similarity of that machine to the human mind. Just suppose you’re sitting at the controls of such a vast source of energy. Are you going to sit back and fold your arms and let it run itself into a ditch? Or are you going to keep both hands firmly on the wheel and control and direct this power to a specific, worthwhile purpose? It’s up to you. You’re in the driver’s seat.”