The Two Trees in the Garden of Eden

God placed Adam and Eve in a beautiful garden (Paradise) which had two special trees—the Tree of Life and the Tree of the Knowledge of Good and Evil. While the LORD (Jesus Christ) told them that they could eat freely of the Tree of Life, He ordered them not to eat of the Tree of the Knowledge of Good and Evil. Why? When they disobeyed, they hid from God. Why? Because of their sin, God did not allow them any longer to eat from the Tree of Life. Why? What did these trees stand for? Are the principles, symbolized by those two trees, still applicable to us today? What kind of a world would we have today if Adam and Eve had eaten from the Tree of Life? Why is there a Tree of Life in heaven? And what do we know about the existence of Paradise in heaven long before the creation of man?