The Reason Man's Disobedience Was Part Of The Plan
The starting point has to be God is sovereign and there is no-one that can tell Him what to do.
This might seem to be strange way to answer this question, but it must be understood that in giving Mankind a free choice – free will – that the man’s decisions still have to come under God’s control. Otherwise, He cannot be God.
So, all of His decisions are based on His foreknowledge of them happening. Heaven is a place of free will. God has a free will to do what He wants but limits Himself to only doing what is in His nature based on His Righteousness and Justice.
Before Mankind was placed on the earth rebellion had already occurred in heaven when Lucifer had decided to rise to the place of God.
The following might be difficult to take onboard or understand but I present it as I have come to see the way these things came about.
Lucifer’s rebellion happen when he ‘saw’ that Adam – mankind was going to be placed between him and God. The basis for my hold this idea has been through recent teaching I have been receiving but to explain would take more time than I want to. There are several scriptures that point to these ideas that happened before the opening of Genesis. We know that Satan – Lucifer – was an adversary from the story of the Garden of Eden because he was trying to upset God’s Plan for Adam.
Isaiah 14:12-14; explains some of this. In Hebrews 2:5-8 it clearly shows that an angel is making a protest to God that refers to Psalm 8:4-6; “What is man that You are mindful of him, and the son of man that You visit him?”.
Given this then it only makes sense that Satan (Lucifer) tried to upset God’s Plan by bring about rebellion in the Garden of Eden. It only takes a few steps to see that God might have planned the answer to Lucifer’s rebellion was to have Mankind be the victor and bring judgement on Lucifer.
Now when Adam was created, he was without Sin. Satan had nothing to bring Adam down, which Adam could work against to show that Adam had power over Satan. Now Adam had free choice, a free will, so to take on this ‘assignment’, no coercing from God could be used to bring Adam to this decision.
When Adam decided to go against God’s Command “Don’t eat of that tree”, it had to be a totally free choice by Adam. The rebellion in the “Garden” now placed Adam in a position that he could choose God’s Words or follow Satan suggestions. The rest of the Bible is the working out of this scenario.
As difficult as this might be for you to take onboard it does answer a lot of difficult questions that might appear throughout the Scriptures.
I have to thank a Jewish Rabbi for some of these ideas from a teaching video as he was instructing Jewish girls how their role in life needed to show that they could work against the ‘evil’ that comes to all.
The fact one sees from the prayer the disciples were asked to pray; “Thy Kingdom come, Thy Will be done on earth as it is in Heven”, points to this truth. It is God’s Plan to return the earth back to The Garden of Eden.
I am not sure if your head is still spinning, but just lay this aside and move on from where you at this moment and don’t be alarmed.