God created the world, and every human being in it, for the purpose of glorifying Himself. The end goal of everything in creation is to show off God’s love and creativity.
Obviously, such an attitude of self-focus would be inappropriate for a mere human being. But God is different. Being infinite love and beauty, its right that God should admire Himself. What more beautiful thing could He find anywhere to gaze upon? There is nothing in the universe as wonderful to behold as Him.
We were created to mirror His love and beauty. The believer mirrors another of God’s traits as well: His grace. We benefit from this relationship in that we receive eternal life, but the reason we exist is to glorify God. Knowing our purpose can set us free from striving to somehow create meaning in our lives.
The unbeliever, however, will reflect a different aspect of God: His justice.
4For he chose us in him before the creation of the world to be holy and blameless in his sight. In love 5he predestined us to be adopted as his sons through Jesus Christ, in accordance with his pleasure and will— 6to the praise of his glorious grace, which he has freely given us in the One he loves.