Ideally, teachers would focus on one single thing: getting their students really, deeply excited about the subject of the course. Everything else, the students can do on their own.
Peter Turney, Apperceptual: Genius, Sustained Effort, and Passion (blog post)
Link from Michael Nielsen
Here’s another of my favorite quotes:
If you want to build a ship, don’t drum up people to collect wood and don’t assign them tasks and work, but rather teach them to long for the endless immensity of the sea.
Antoine de Saint-Exupery