Tsk tsk. You should study the Bible more.
"If the garden is a sanctified, holy area, one would think that God would have the sovereign power and desire to keep it that way. Unless, of course, there was a divine purpose involved for Satan to be there. And what would that purpose be? To tempt Adam into the fall so that man would come into the knowledge of good and evil, overcome it through the power Of Jesus Christ and the Holy Spirit, and be raised complete in the image and likeness of God. Man cannot be an overcomer until he has something to overcome, like sin and Satan. In my mind, Satan is the “smoking gun” who served the greater purpose of God in the Garden of Eden.
One other observation: Whereas Genesis 1:26 states that God was to create man in His own image and likeness, Genesis 1:27 shows that man was only created in God’s “image.” It wasn’t until Genesis 3:22 when Adam ate of the tree of the knowledge of good and evil that he became “like” God.
To Summarize:
1. Man was to be created in the likeness and image of God (Genesis 1:26).
2. Part of this “likeness” was a knowledge of good and evil (Genesis 3:22)
3. For Adam to be truly “like” God, he had to acquire a knowledge of good and evil.
4. The means to that end was eating of the tree of the knowledge of good and evil.
5. To do that a “tempter” was likely needed to entice Adam into sin.
6. God provided, or allowed, Satan as the tempter.
7. God knew in advance what the outcome would be, but allowed it anyway.
8. God knew atonement would be required, and provided Jesus Christ as the “Lamb slain from the foundation of the earth” (Revelation 13:8).
9. Man achieves the likeness of God, acquires a knowledge of and overcomes evil, partakes of Christ, and is reunited in paradise with God. Man is now an overcomer with a keen knowledge of good and evil.
The key to all this remains, “Is acquiring a knowledge of good and evil a prerequisite to coming into the likeness and image of God? If the answer is yes, I think Adam has to eat from that tree, and God has to make it happen. If the answer is no, then I think you have to look back to Genesis 3:22 and reconcile that with Genesis 1:26, explaining how Adam is “like” God, but at the same time lacks a knowledge of good and evil? Also, how does man acquire that knowledge without eating of the fruit of that tree?"
Satan in the Garden of Eden