Here are some quotes that I really like:
“All that is complex is not useful. All that is useful is simple.” — MikhailKalashnikov
“It should be as simple as possible, but no simpler” — Albert Einstein
“Do the simplist thing that works” — Second XP Principle
“You aren’t going to need it” (YAGNI) Principle – unknown
I think the above quotes are very interesting and true. I think they will most definitely play an important role in any programmers life.