Paul writes that he is an apostle of Jesus Christ, according to the faith of God's elect and "the acknowledgment if the truth which accords with godliness" (Titus 1:1). To say we know the truth and not live accordingly is a denial of truth, a rejection of truth if you will. It would be better if we did not know the truth, than to know it and not live by it (2 Peter 2:21-22).
We base our lives on the truth of Jesus Christ "in hope of eternal life which God, who cannot lie, promised before time began..." (Titus 1:1-2). We are already eternal beings because God breathed in us the breathe of life (Genesis 2:7). We will eternally exist with God or be separated from him in judgement (John 5:28-29).
The eternal life promised is a life with and in the very presence of God that lasts forever (Revelation 7:9-17; 14:12-13; 21:1-7)
