Here are a few programming quotes I like:

“A complex system that works is invariably found to have evolved from a simple system that worked.”
John Gall

“Enlightened trial and error outperforms the planning of flawless intellects.”
David Kelley

“It’s OK to figure out murder mysteries, but you shouldn’t need to figure out code. You should be able to read it.”
Steve McConnell

“Working software is the primary measure of progress.”

“Simplicity — the art of maximizing the amount of work not done — is essential.”