Wherever we go exploring in the world around us, we find

mysteries. Our planet is covered by continents and oceans whose

origin we cannot explain. Our atmosphere is constantly stirred

by poorly understood disturbances that we call weather and climate.

The visible matter in the universe is outweighed by a much larger

quantity of dark invisible matter that we do not understand at all.

The origin of life is a total mystery, and so is the existence

of human consciousness.

Freeman Dyson, “How We Know”