There are no guarantees in life.

But if you do that, the odds of you prospering will be much better than if you are a taker, a cancer cell, a selfish person who does not see yourself as a part of something larger that you care about and serve. The more value that you create for others, the more they will be willing and able and required to pay you. (Competition can be a wonderful thing.) The more value that you create for others, the more power you will have in economic as well as other relationships.