People have always had a tendency to divide everything into two categories: above and below, light and dark, good and evil. Scientists, on the other hand, strive to illuminate and define the areas between them. — : 1825
‘Simply go on climbing. It’s like writing a novel. Everything’s quite straightforward at first - the early chapters go with a tremendous swing, but sooner or later you begin to tire. You look back and see you’re only halfway through. You look ahead and see you still have as much again to write. If you lose heart at that stage, you’ve had it. It’s easy enough to start something. Finishing it is the hard part.’ — : 7055