The Tree Of Life
The tree of life was in the garden of Eden and Adam and Eve were able to eat of it freely. In the garden was also the tree of the knowledge of good and evil. God forbade them from eating of this fruit as they would die. However the devil was able to tempt them to do so. Through this sin of disobedience they fell and so did all creation with them. Since then all of creation has been affected by sin. This is the reason why Jesus has to come to redeem us. He did this by dying on the Cross for us. Now the tree of life lives in us when we trust His salvation on our behalf. Jesus comes to live in us through His Holy Spirit.
Fruit
The tree of life bears fruit that nourishes our spirit. Our spirit then affects our soul and our body. The words of life bear fruit in us and we enjoy it and share it with others. This is the way God had planned it from the beginning. However the devil cannot be part of this redemption. He is condemned to hell with his angels. However he wants to take as many as possible to hell with him. This is why we need to share the good news of the gospel to all who will listen. There is no other way to be saved.
Salvation
God planned from the beginning that we were helpless to save ourselves. He therefore has provided for us a lamb as a sacrifice on our behalf. Come and receive His salvation today. He died for all, yet all will not receive Him. Most will reject His plan of salvation. Most will be happy to continue to eat of the fruit of the knowledge of good and evil. This is what we see in our fallen world. The wars within and without confirm our fallen state. There is no redemption other than through Jesus. He has promised us eternal life. Come now and be saved in Jesus Name.