"There's no obvious reason to assume that the very same rare properties that allow for our existence would also provide the best overall setting to make discoveries about the world around us. We don't think this is merely coincidental. It cries out for another explanation, an explanation that... points to purpose and intelligent design in the cosmos."
Source : Guillermo Gonzalez, Jay Wesley Richards (2004). “The Privileged Planet: How Our Place in the Cosmos Is Designed for Discovery”, p.15, Regnery Publishing