In Christianity I've heard MUCH about "The Fall" (when Adam and Eve sinned" and thereby FELL away from God's plan and FELL OUT of God's grace. (Supposedly) Adam, Eve, and the serpent "messed up" God's perfect plan. God created the perfect environment in the Garden of Eden that Adam and Eve "were supposed" to live out their lives in happy bliss. However, they disobeyed God, fell out of his will, and messed up God's perfect plan. Now, because of Adam and Eve's screw up, then God had to send His Son Jesus to die for the sin that came into the result as their sin. Jesus had to clean up and correct the mess of things that Adam and Eve made.
"working out everything according to his plan
Before the creation of this world "He was chosen before the creation of the world, but was revealed in these last times for your sake. " 1 Peter 1:21
Before anything came into being
"3Praise be to the God and Father of our Lord Jesus Christ, who has blessed us in the heavenly realms with every spiritual blessing in Christ. 4For he chose us in him before the creation of the world to be holy and blameless in his sight. In love 5he[c] 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. 7In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God's grace 8that he lavished on us with all wisdom and understanding. 9And he[d] made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, 10to be put into effect when the times will have reached their fulfillment—to bring all things in heaven and on earth together under one head, even Christ. 11In him we were also chosen,[e] having been predestined according to the plan of him who works out everything in conformity with the purpose of his will, 12in order that we, who were the first to hope in Christ, might be for the praise of his glory. 13And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit, 14who is a deposit guaranteeing our inheritance until the redemption of those who are God's possession—to the praise of his glory." Ephessians 1:3-14