"I am not interested in the psychology of characters, but in the psychology of situations."
You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.
Some people are extraordinarily good at knowing the limits of their knowledge because they have to be.
The only real failure in life is not to be true to the best one knows.
We're here to put a dent in the universe. Otherwise why else even be here?