In themselves, harmless. As a group, incredibly dangerous. - Isaac Asimov

In the course of my fight with the school, I couldn't help but notice that I became a pariah. [...] Once, however, a fellow faculty member, making sure we were unobserved, said to me, "Isaac, the faculty is proud of you for your courage in fighting the administration for academic freedom."
I said, "There's no courage involved in it. Don't you know my definition of academic freedom?"
"No. What's your definition of academic freedom?"
I said, "Independent income."

An Earthman will give you anything as long as it costs nothing and is worth less

Capek lamó a estos seres humanos artificiales robots, que era una palabra checa para «trabajadores forzados» o «esclavos». De hecho, las siglas del título de la obra proceden de «Robots Universales de Rossum», el nombre de la compañía del héroe.