Happy birthday to Isaac Asimov! The prolific writer was born this day in 1920. The author of the Foundation series, the Robot series, and so much more, Asimov’s work was enormously influential in the world of speculative fiction. However, Asimov loved science as much as fiction, and spent a good amount of his career advocating for its study and responsible use. As a man who was passionate about education, willful ignorance earned Asimov’s ire in a way that little else could. Here are four unforgettable quotes from Asimov on the dangers of ignorance and the importance of science.