After completing his reading of 'The Cosmic Connection' by Sagan, he decided to write him a letter as a sign of gratitude. It read: "I have just finished The Cosmic Connection and loved every word of it. You are my idea of a good writer because you have an unmannered style, and when I read what you write, I hear you talking. One thing about the book made me nervous. It was entirely too obvious that you are smarter than I am. I hate that." The last line was, of course, written in good humor.
It would only be the first of many letters and notes Asimov sent to Sagan. They were all published in the book 'Yours, Isaac Asimov: A Lifetime of Letters' that was edited by his brother, Stanley Asimov.
In one of his last books, Asimov wrote that his life was just about over and he stated: "It's been a good life, and I am satisfied with it. So please don't worry about me."
