What if the man might take the fruit from the tree of life, would eat that fruit and will live forever?
By the Breath of God, His Words were formed. By His Words came everything into being, but only the man was blessed by the Breathing of God in his nostrils so that life came into him but also a special relationship was created.
After the wrong choice and action of the first human beings the elohim had no other choice than to bring over man the curse He had warned them for. But out of love for His creatures He also provided straight away a solution against the curse of death and gave man a second chance.
God made Himself a beautiful Royal Garden, the Gan Eden with in the midst of it a Etz HaDa'as Tov v'Rah or Tree of moral of which God asked man not to touch it nor eat from the fruit that gives knowledge about good and evil because they would then certainly die. But we come to see that the nachash (temptation) was to strong for the isha and she got her husband involved in her act of disobedience to the Elohim.