John Piper has offered so many great explanations for those itching questions about God and the Bible, and this is one of those itching questions: “Why Did God Forbid One Tree in Eden?” Was it just to see if Adam and Eve were going to be obedient? Why wasn’t it a whole set of trees or foods like God did with Israel? Is the forbidding even the main point at all?
This is what John offers as an explanation:
So the issue of the tree is this: Will we keep looking to God as the giver and lover and treasure of this garden so that all our eating is thanking and all our savoring is a savoring of God? Will we keep on experiencing every one of these tastes as a tasting of something like what God is, and in that sense a tasting of God? Will we keep on enjoying God in the enjoying of the trees?
That is what the forbidden tree was there to test.