The development of the individual requires sacrifice!
The process of maturation requires multiple levels of sacrifice, including what some would call the ultimate sacrifice - putting another's needs in front of your own. This is the role of the parent to the child, the mentor to the protege, and in Christian terms - Christ to the Believer. Often, people think of the act of sacrifice in terms of loss, but it is just as valid to think of sacrifice as a necessary vehicle to future gain. Without sacrifice, it would seem that the individual is incentivized to search for nothing more than impulsive pleasures with short-term gain and long-term consequences. What have you sacrificed for the people you love? Having seen the result of your sacrifice, would you trade that sacrifice for short-term pleasure-seeking behavior?