"I can't tell you what that little ingredient is which makes that first person want to go on and aggressively do more, and the other person be content to not do that. It's a mystery, but it does happen"

This quote by Sam Donaldson talks to the mystery of human inspiration. He is suggesting that there is an unknown element that drives some people to do something about it and be ambitious, while others are content to stay in the exact same location. He implies that this element is a mystery, and that it is difficult to determine what it is that makes one person pursue more while another is content with the status quo. This quote speaks with the complexity of human nature and the problem of comprehending why people act the method they do. It is a pointer that there are many unknowns in life, and that we ought to not consider approved the motivations of others.