The wonderful Tree of Life, discussed in the two "book ends" of the Bible, Genesis and Revelation, is one of the most fascinating (yet enigmatic) subjects in all the inspired word of God. It is first mentioned in Genesis 2:9:

“Let us lift up our heart with our hands unto God in the heavens” (Lamentations 3:41).

“For He taught His disciples, and said unto them, The Son of man is delivered into the hands of men, and they shall kill Him; and after that He is killed, He shall rise the third day. But they understood not that saying, and were afraid to ask Him” (Mark 9:31,32).

“Why standest thou afar off, O LORD? Why hidest thou thyself in times of trouble?” (Psalm 10:1).

“And many other signs truly did Jesus in the presence of His disciples, which are not written in this book: But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through His name” (John 20:30,31).