Simplicity is the ultimate sophistication. -- Leonardo da Vinci
Making the simple complicated is commonplace; making the complicated simple, awesomely simple, that's creativity. -- Charles Mingus
The lesson of Henry Eyring's life is that simple people, people just like you and me, can change the world. We do it a little bit every day. And we have the potential to change the world much more, if we can better understand and use our unique gifts. -- Mormon Scientist: The Life and Faith of Henry Eyring
Make everything as simple as possible, but not simpler. -- Albert Einstein
To hear is relatively simple. To heed and apply what is heard becomes life's perpetual challenge. -- Charles Didier

I could make this post longer, but there’s no point in complicating things.