In the Garden of Eden, there were two kinds of trees: the tree of the knowledge of good and evil and the tree of life.
Adam and Eve, who came to die by eating from the Tree of the Knowledge of good and evil and by committing sins, tried to eat the Tree of Life so that they would live forever.
Since they had committed sins by disobeying God's command, God didn't allow them to eat the Tree of Life.

An important point to notice here is that though sinners can live forever once they eat the Tree of Life. Is there any way to eat the Tree of Life?

According to Jesus' teachings, we can learn the secret of eternal life through the parable of the Tree of Life.

Mt 13: 35
..I will open my mouth in parables, I will utter things hidden since the creation of the world.

What is the reality of the Tree of Life? When you eat the Tree of Life, you will have eternal life. Jesus said when we eat Jesus' flesh and drink His blood, we would have eternal life. We can eat Jesus' flesh and drink His blood by keeping the New Covenant of the Passover.

Jn 6: 54
Whoever eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day.

Mt 26:19, 26-28
So the disciples did as Jesus had directed them and prepared the Passover...While they were eating, Jesus took bread, gave thanks and broke it, and gave it to his disciples, saying, "Take and eat; this is my body."
Then he took the cup, gave thanks and offered it to them, saying, "Drink from it, all of you.
This is my blood of the covenant, which is poured out for many for the forgiveness of sins.

So, the reality of the Tree of Life is the New Covenant of the Passover.
In this world, only the World Mission Society Church of God keeps the New Covenant of the Passover. In order to have eternal life, we must keep the Passover, which is the reality of the Tree of Life. I hope everyone comes and keep the Passover of the New Covenant.