Answer: The Spirit gives us life, (verse 6).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
Galatians 6:8: "The one who sows to please his sinful nature, from that nature will reap destruction; the one who sows to please the Spirit, from the Spirit will reap eternal life."
Revelation 2:7: "He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the paradise of God."