Great teams are made of players who make contributions on more than just game days. You may not be a starter, but with the right perspective, you can make an impact on your team's performance.
In this passage, the older brother displayed the wrong perspective. He viewed himself as a servant rather than as a son. He got his self-worth from what he did rather than from who he was. Do you know that as a Christian God views all of us as sons and daughters? He loves us regardless of our role on the team, how small our bank account might be or what our title is at work. In fact, He sent His only Son to die for us even though He knew we would deny Him (Romans 5:8).
Where does your identity come from? Is it your job, sport, appearance, money or God's Word? Whatever it is, it will set the tone for your outlook on life.