The decree of God

The sovereign purpose of God is defined theologically as the decree of God. The decree of God includes all that God accomplishes through natural law, all events and actions that God does Himself, and all acts of humans. Though we cannot understand it, God has come up with a system whereby He has given humans freedom of choice--yet this all-wise God, in complete knowledge of what humanity will do, has come up with a perfect, divine plan.
The divine plan includes all that has happened , such as Adam and Eve being permitted to sin so that there could be the divine remedy of Christ's death and the eternal fellowship of believers with God. It includes all enemies of God being made the footstool of Christ and their eternal rejection.
"It is not a blind, mechanical philosophy of fatalism but an intelligent, loving wise plan in which man, responsible for his choices, is held accountable for what he does and is rewarded for his good work. Before such a God man can only bow in submission, love and adoration" (Chafer, 1947, vol. 1)

-Strengthened by Grace: A systematic Theology Handbook, Richard E. Wager