A sovereign God is absolute in His rights and powers. He is the only true totalitarian. Sovereign means basically that he is the highest One, and of course that implies that everything else is below Him. The sovereignty of God has been presented in its general teaching. And now to consider it in its relation to predestination.
Predestination is the destiny of man planned in advance.
The decree of God is what God purposes before time with reference to all things, and predestination is what God purposes before time with reference to rational creatures alone. God chooses some to salvation and passes by others leaving them to condemnation. If any man is ever saved it rests in the goodness and mercy of God who must make him a partaker of His goodness and mercy. Predestination has to do with God's decision to save some of Adam's fallen race. It is through predestination that God would magnify Himself in His grace, mercy and justice.