Everyone lives their life relying on something or someone.

What you rely on spiritually is what you depend on for your worth, value, and acceptance. Some of the Galatians believers were relying on the law-they were attempting to find their acceptance and worth through their works.

In Galatians 4:21-31, Paul gives an illustration to teach us that we must rely on God and His grace alone. And that when we do, God will provide us with the hope and encouragement that we need.