In celebration of Heinlein, a tribute to a master from a master. Spider Robinson eulogizes Robert A. Heinlein in 1980:
You can’t copyright ideas; you can only copyright specific arrangements of words. If you could copyright ideas, every living SF writer would be paying a substantial royalty to Robert Heinlein.
Also, from The Space Review, which has been running some great RAH commentary lately, a bit about Heinlein and the need for going to space: “We Must Ride The Lightning“.