Exactly what happens to a person when Jesus takes up residence in a person's life? And does this have any affect on his free will?
K
Now we're getting somewhere! This is the direction you want to look, to gain understanding of this "stuff." First of all let me address free will, 'cause that's easy. We don't lose any of it in this life. All it means is we do what we choose, as much as we are able.
There are many ways of phrasing "when Jesus takes up residence in a person's life." And it is not so black-and-white, although I think G-d would like it to be. Anyway, no part of that involves some switch we can flip so we simply obey G-d. We mess up, for an endless variety of reasons including not knowing any better. We are after all talking about things that can't be seen, so in some sense we very much are blind. This also makes it difficult to talk about in precise terms, so your good question of "Exactly what happens to a person when Jesus takes up residence in a person's life?" has no simple answer.
This is Good News because if it were simple, life would be nothing but boring. Instead, the 4 Gospels serve a function of bringing us face-to-face with Jesus' Life, and the rest of the NT shows us "what happens to a person when Jesus takes up residence in a person's life." Beginning with Acts, (right after the Gospels) which admittedly has some boring details in it.
The fact is, each and every believer has a unique "what happens to a person when Jesus takes up residence in a person's life." To go into great detail of what this meant
to me, has a low likelihood of being relevant to you. To soak in the Scriptures themselves and watch them come alive in yourself, we would share a common bond known as "Christian fellowship." And yet,
"what happens to a person when Jesus takes up residence your life," would be unique, and at least somewhat new to me, as well as everyone else on CF. This is a manifestation of God's Glory; i.e., showing us how great He is.