… man has flown in the face of everything he knew time after time. He knew, not too many hundreds of years ago, that the Earth was the centre of the universe. He knew, less than thirty years ago, that man could never travel to the other planets. He knew, a hundred years ago, that the atom was indivisible. And what have we here—the knowledge that time never can be understood or manipulated, that it is impossible for a plant to be intelligent. I tell you, sir...