I have had to work long and hard to eradicate the dangerous delusion that, in a bad position, I could always, or nearly always, conjure up some unexpected combination to extricate me from my difficulties.
The greatest grand challenge for any scientist is discovering how to prevent the spread of HIV and finding the cure or an effective vaccine for AIDS.
If I want to write a movie, I'll write a screenplay, but if I have an idea for a book, it's something that I think can only be done novelistically.

