As fearful people we are inclined to develop a mind-set that makes us say: "There's not enough food for everyone, so I better be sure I save enough for myself in case of emergency," or "There's not enough knowledge for everyone to enjoy; so I'd better keep my knowledge to myself, so no one else will use it" or "There's not enough love to give to everybody, so I'd better keep my friends for myself to prevent others from taking them away from me." This is a scarcity mentality. It involves hoarding whatever we have, fearful that we won't have enough to survive. The tragedy, however, is that what you cling to ends up rotting in your hands.
-Fr. Henri Nouwen