Knowing your limits, and that there is a limit to getting what you want, comes from a sense of self-respect instilled in you from an early age. It takes guts to stand up in the face of what you really want, but you have to know in your heart that if you make the wrong choice you won't be able to live with yourself for the rest of your life. There is only one person who matters at that point and that's YOU. If you give in to such pressures, you strip away your self-respect, your personal ethics and your standards - the very things that create the fiber that will hold you together for the rest of your life.