Deuteronomy 30:19-20 ... Therefore choose life, that you and your offspring may live, loving the Lord your God, obeying his voice and holding fast to him, for he is your life and length of days…
The "life" talked about here is living for God, obeying Him and loving Him with your whole life. We have a choice to live for God and have real, abundant, eternal life in Him, or to choose death by living for ourselves.
So choose life. Love the Lord your God. Obey His voice. Hold fast to Him. For He and He alone is your life and your length of days.