The tree of life was a symbol, signifying God as the proper source (cf. Psa. 36:9; John 1:4; 10:10b; 11:25; 14:6; 1 John 5:12; Col. 3:4). If we only read Genesis 2, we will be unable to understand the meaning of the tree of life. However, the Gospel of John reveals the life denoted by the tree of life in a concrete way. John 1:4 says, "In Him was life," and John 15:5 tells us that the Lord Jesus is a vine tree. If we put these two verses together, we will realize that Christ is the tree of life. Jesus, the embodiment of God, is the tree of life. Therefore, the tree of life in Genesis 2 is a symbol of God as the source of life.
Besides this source, there is another tree, another source in the universe—death. However, this tree is not called the tree of death; it is called the tree of the knowledge of good and evil. There is such a tree in this universe. These two trees oppose one another, the tree of life denoting God as the source of life, and the tree of knowledge signifying Satan as the source of death. As God is the source of life, Satan is the source of death. Therefore, in Genesis 2 we find two sources signified by two trees.
Throughout the course of this life-study, we have pointed out several times that nearly everything in Genesis 1 and 2 is a seed of the divine revelation. The two trees are such seeds. Along with all the other seeds sown in Genesis 1 and 2, these seeds grow in the following books of the Bible and are reaped as a harvest in the book of Revelation. In Revelation 20:10, 14 we see that death is cast into the lake of fire. In Revelation 22:2 we see that life abides in the New Jerusalem. At the beginning of the Bible we find death and life, and at the end of the Bible we again see death and life. Between the two ends of the Bible two lines are set forth—the line of death and the line of life. Both lines begin in the book of Genesis and end in the book of Revelation. Death begins with the tree of knowledge of good and evil and ends with the lake of fire. Life begins with the tree of life and ends at the New Jerusalem. Before we were saved, we were on the line of death. After we were saved, we were put on the line of life.
The first of these two choices was the tree of life, which denoted God Himself as life. The content of the tree of life is life. It is life, simply, purely, and absolutely. The nature of this tree and the result of this tree are also life. Life is the content, nature, and result. Everything is life.