Now, the velocity of wave propagation can be seen, without the aid of any mathematical analysis, to depend on the elasticity of the medium and its density; for we can see that if a medium is highly elastic the disturbance would be propagated at a great speed. Albert Abraham Michelson
We notice the movement of automobiles and beings in the street, but we do not notice that the earth turns. We believe that automobiles go at a great speed on a fixed ground; yet the speed of the earth's rotation at the equator is 40,000 km every 24 hours. Alexander Calder
We ordinary people might lack your great speed or your X-Ray vision, Superman, but never underestimate the power of the human mind. We carry the most dangerous weapon on Earth inside these thick skulls of ours. Mark Millar