If the intensity of the material world is plotted along the horizontal axis, and the response of the human mind is on the vertical, the relation betw… - Hans Christian von Baeyer

Time has been called God's way of making sure that everything doesn't happen at once. In the same spirit, noise is Nature's way of making sure that we don't find out everything that happens. Noise, in short, is the protector of information.

Paradox is the sharpest scalpel in the satchel of science. Nothing concentrates the mind as effectively, regardless of whether it pits two competing theories against each other, or theory against observation, or a compelling mathematical deduction against ordinary common sense.

The problem of defining exactly what is meant by the signal velocity, which cropped up as long ago as 1907, has not been solved.