"An Ixian machine? You defy the Jihad!" "There's a lesson in that, too. What do such machines really do? They increase the number of things we can do without thinking. Things we do without thinking — there's the real danger."
Leto and Siona, during her test on the Sareer
This is from God Emperor of Dune by Frank Herbert. There is so much stuff I've taken for granted, & many times that I have been caught out because I didn't understand.
The Dune Chronicles are awesome & I highly recommend them.