I'm very very fond of The Old Astronomer to His Pupil, especially the last line: I have loved the stars too fondly to be fearful of the night.

I am also very fond of Ursula LeGuin on writing what you know and Ursula Vernon on editing.

I am also fond of King Sneferu's pyramids, Just because you're trash doesn't mean you can't do great things; it is called garbage can, not garbage cannot and the motto TO THINE OWN SITH BE TRUE (from The Tragedy of the Sith's Revenge) -- idk, I find it strangely motivating.