God has prepared certain things for each of us that we have to fulfill. (Ephesians 2:10; Philippians 2: 12-14)
He developed a plan for each of us, which is to obtain a perfect victory over the sin that lives in our flesh, so that our spirit, of which God is so jealous, could return to Him full of the virtues of Christ, full of the divine nature. Then we will have free access to the eternal kingdom. (2 Peter 1: 2-11)
God wants to share his nature with us. And the goal of this relatively short stay on earth is to transform from human nature to the nature of God. To appear before Him holy and blameless, we must work in fear and trembling for our salvation.