The best that Gauss has given us was likewise an exclusive production. If he had not created his geometry of surfaces, which served Riemann as a basis, it is scarcely conceivable that anyone else would have discovered it. I do not hesitate to confess that to a certain extent a similar pleasure may be found by absorbing ourselves in questions of pure geometry.
What happens in a play is determined to a certain extent by what I thought might be interesting to have happen before I invented the characters, before they started taking over what happened, because they are three-dimensional individuals, and I cannot tell them what to do. Once I give them their identity and their nature, they start writing the play.