The rabbis tell us that through money, we establish day-to-day situations that uncover our bigotry and illusions and expose us in a way only practice and empirical experimentation can otherwise do. We are as we react, we are what we believe, and our money is an extension of our reactions and beliefs. Based on the money that moves in and out of our lives, we structure our comprehension of the world. And this is one of the main factors in determining our understanding of reality: how much things and people are worth to us, and how much we are worth to them.
— Nilton Bonder, The Kabbalah of Money