The true definition and meaning of sustainability are often quoted as being:  "Development that meets the needs of the present without compromising the ability of future generations to meet their own needs." However, this is a very dry, sterile, and complete definition. It is my belief that this definition stifles discussion and prevents deep thinking about the subject. But for the subject of sustainability to remain relevant, I also believe we have to keep the conversation going and remember why we need to work at it. To that end, I have collected 27 great quotes that put questions into the brain, causing it to stop, reflect, consider, and react.