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And you talk glibly of eternal life

Jesus died on the cross to save us all from sin and the eternal separation from God that sin causes

the promise of eternal life is a gift, freely offered to us by God.

Like ours, his human nature is destined for eternal life; but unlike ours, it is perfectly exempt from sin, the cause of death Rom 5:12

12 Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all people, because all sinned

; ⇒ Heb 4:15.

15 For we do not have a high priest who is unable to empathize with our weaknesses, but we have one who has been tempted in every way, just as we are—yet he did not sin.

The beatitude of eternal life is a gratuitous gift of God. It is supernatural, as is the grace that leads us there. 2 Pet 1:4; cf.

4 Through these he has given us his very great and precious promises, so that through them you may participate in the divine nature, having escaped the corruption in the world caused by evil desires.

⇒ Jn 17:3.

3 Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.

Although it is God’s grace that enables us, for these acts of ours, God tells us Rom. 2:6–7

6 God “will repay each person according to what they have done.”[a] 7 To those who by persistence in doing good seek glory, honor and immortality, he will give eternal life.

Gal. 6:6–10

6 Nevertheless, the one who receives instruction in the word should share all good things with their instructor.
7 Do not be deceived: God cannot be mocked. A man reaps what he sows.
8 Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life.
9 Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up.
10 Therefore, as we have opportunity, let us do good to all people, especially to those who belong to the family of believers

Remember clearly at the end of John 6, when Christ asks his disciples if they too will leave Him, when He told them they would need to eat His Body and drink His blood, then Peter said

"Master, to whom shall we go? You have the words of eternal life."

Jesus alone holds the words of eternal life because He is the Word of God (the bible is the written word, but the LIVING Word is Jesus Christ)