The Tree of Life?

Was it a real (physical) tree in the Garden of Eden?  Is it a real tree described by John in the book of Revelation? Is it just a symbol?  So what if it is? Does it matter thinking about such things? The fruit of the righteous is a tree of life, and whoever captures souls is wise  (Proverbs 11:30 ESV). Now here is the right question. Are we being the tree of life to others? Is Jesus, the true Tree of Life, living inside us, so that when people look at us, are they captivated by Jesus?