One aspect of the tree of life was/is maintenance of the creation.
Man rejected God in Eden -and many times afterward.
God -for the most part -allowed the creation to fall into whatever state it would -and allowed man to experience it. Not all of our problems are caused by human choices, but many are. Some are happenstance and God also determines some difficult situations for overall psychological effect.
It is a harsh reality, but one we would continually choose without experience -that is essentially the tree of the knowledge of good and evil.
All of the creation is renewable, but our minds are being created and perfected by this experience -and the experience will result in a correct mental state -which will make renewing the creation worthwhile, as we will learn the necessity of God's government, his power over the creation/knowledge of the creation -and he will not have to spend eternity fixing our mistakes.
1And as
Jesus passed by, he saw a man which was blind from
his birth.
2And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
3Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him.
4I must work the works of him that sent me, while it is day: the night cometh, when no man can work.
5As long as I am in the world, I am the light of the world.
6When he had thus spoken, he spat on the ground, and made clay of the spittle, and he anointed the eyes of the blind man with the clay,
7And said unto him, Go, wash in the pool of Siloam, (which is by interpretation, Sent.) He went his way therefore, and washed, and came seeing
…
19For the anxious longing of the creation waits eagerly for the revealing of the sons of God.
20For the creation was subjected to futility, not willingly, but because of Him who subjected it, in hope
21that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God.…
It has already been determined that all tears will be wiped away.