David

“A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of a human being?”
― Carl Sagan, Pale Blue Dot: A Vision of the Human Future in Space

“Rocket ships
are exciting
but so are roses
on a birthday.”
― Leonard Nimoy, Come Be with Me: A Collection of Poems

“Don't follow the crowd, let the crowd follow you.”
― Margaret Thatcher

“I'm even going to electrolyze my urine. That'll make for a pleasant smell in the trailer.

If I survive this, I'll tell people I was pissing rocket fuel.”
― Andy Weir, The Martian