726. Eternal life and salvation are not possible without a partnership with the Lord, because he himself is eternal life and salvation. The following statement in John, as well as other passages in the Word, make it very clear that he is eternal life: "Jesus Christ is the true God and eternal life" (1 John 5:20). He is also salvation, because this is the same thing as eternal life. In fact his name, Jesus, means salvation; therefore throughout the entire Christian world he is known as the Savior.
Nevertheless, the only people who come forward worthily to take the Holy Supper are people who have an inward partnership with the Lord; and the only people who have an inward partnership with him are the people who have been regenerated. (Who the "regenerated" are has been shown in the chapter on reformation and regeneration [571-625].)
[2] Now, there are of course many people who confess the Lord and do good things for their neighbor. If they do not do these things out of love for their neighbor and faith in the Lord, however, they have not been regenerated. Such people do good things for their neighbor solely for reasons that focus on the world and themselves, and not on their neighbor as their neighbor. The things that such people do are merely earthly and do not conceal anything spiritual inside them. The people who do them confess the Lord, but only with their mouth and lips, while their heart is far away.
Genuine love for our neighbor and genuine faith come solely from the Lord. Both of these qualities are granted to us when we use our free choice to do good things for our neighbor in an earthly way, believe truths in a rational way, and turn to the Lord, doing all three because we have been commanded to in the Word. Then the Lord plants goodwill and faith in our core, and makes them both spiritual. In this way, the Lord unites himself to us and we unite ourselves to the Lord - there is no partnership if it is not reciprocal. But these points have been more fully demonstrated in the chapters on goodwill [392-462], faith [336-391], free choice [463-508], and regeneration [571-625].