Free Grace theology should be thoroughly Christocentric, not least of all because eternal life itself is entirely Christocentric.
What I mean is, eternal life is centered around Jesus. By contrast, how many religions are man-centered, works-centered, Mary-centered, saints-centered, money-centered, or even cult-leader-centered? But eternal life is about Jesus. How so?
You are called to believe in Jesus for eternal life, but you should also realize that the life He gives you is Himself!
In Him was life, and the life was the light of men (John 1:4).
Jesus said to her, “I am the resurrection and the life. He who believes in Me, though he may die, he shall live (John 11:25).
Jesus said to him, “I am the way, the truth, and the life” (John 14:6a).
When Christ who is our life appears, then you also will appear with Him in glory (Col 3:4).
Eternal life is Christocentric because Christ is eternal life. He is both the Giver and the Gift. As Major Ian Thomas put it:
Jesus Christ and eternal life are synonymous terms, and eternal life is none other than Jesus Christ Himself, of whom it is written in John 1:4: “In him was life; and this life was the light of men.” If you have eternal life at all, it simply means that you have the Son, Jesus Christ—now! Jesus said, “I am the way, I am the truth, I am the life” (John 14:6, emphasis added).
Eternal life is not a peculiar feeling inside! It is not your ultimate destination, to which you will go when you are dead. If you are born again, eternal life is that quality of life that you possess right now, at this very moment, in your own physical body, with your own two feet on the ground, and in the world today! And where does this life come from? Of Him! He is that life! (The Saving Life of Christ, 149).