Reading his book, The Last Lecturer, will make you humble. It may or may not change your view of the world, but it will certainly make you think. I think he died a happy man, with a filled life. I know he was an inspiration to many people, and he will be missed. In his book, he mentioned a letter which someone sent him, which was a quote from Krishnamurti, a spiritual guru. Krishnamurti said (paraphrasing) that when a person dies, a little piece of the people he knows, dies with him.
Randy and his family are not alone, and I'm sure they feel the love.