1/7 Genesis 3:22

²² Then the LORD God said, "Behold, the man has become like one of us in knowing good and evil. Now, lest he reach out his hand and take also of the tree of life and eat, and live forever'"

The tree of life was in the middle of the Garden of Eden, so God put Adam and Eve out of the Garden and guarded the tree with a flaming sword. Why would the Trinity (Father, Son, and Holy Spirit -note the use of the word "us") not want Adam and Eve to live forever? Didn't Jesus come to give us eternal life?

Adam and Eve had fallen. They once thought only of pure things, but now their hearts know the momentary pleasure that can be found in evil. God is aware of that as well. In that sense we are like God. The difference is that God sees the end result of evil and will never choose its temporal pleasure. Sin is a candy-coated poison that tastes delightful, but ends up destroying you. The Trinity did not want the first couple to live forever in that destructive state. There was already a better plan in place (Ephesians 1:4-5). It is found in Genesis 3:15. A male child will be born of a woman. He will defeat the Tempter. He will provide a way for man to have the power to choose what is good. That power is the presence of the Holy Spirit in the life of those sanctified by faith in the sacrifice of Jesus in their place. A way was made for us to live forever without the destructive power of sin in our lives (Romans 8:13).

Consider: Sometimes God withholds from us something that we think we absolutely need. We must trust that He is doing it for our good. Be assured that His desire is for our ultimate good.