If time travel is possible, where are the tourists from the future? Stephen Hawking

I couldn’t repair your brakes, so I made your horn louder. Steven Wright

The system of nature, of which man is a part, tends to be self-balancing, self-adjusting, self-cleansing. Not so with technology. Ernst Friedrich Schumacher

Ours is the age which is proud of machines that think and suspicious of men who try to. Howard Mumford Jones