Jesper Rønn-Jensen has some Great Quotes For The Agile Project Wall
My 2 favorites are:
“Life is really simple, but we insist on making it complicated” - Confucius
In software development, we usually tend to try to understand and design all on advance (maybe fearing that later we, our customers and out team won't be so smart as now?) Haha, I think that the truth is that doing requirements and programming incrementally contributes to simplicity and a better continuous understanding of the business domain and our software. So, let's keep it simple and develop in small increments.
Project success is not product success - Jeff Patton, Agile Alliance
In traditional software development, our teams are used to just completing a schedule and releasing the software, but actually our focus should be on the product success, fully satisfying the customer. This is one of the reasons I like agile methods, they focus on the product adding business value continuously.
Check the other quotes and contribute if you got more!