MG: OK, now we've set up a hypothetical condition/situation that Jesus is the Son of God in the flesh, Savior of mankind.
Or, as others believe, that Jesus was another manifestation of God.
I'm going to also assume that the biblical record is generally accurate as to what we read in the New Testament.
Now that's a stretch, since you just brought man's hand into your hypothetical.
Jesus called disciples, later called apostles. Jesus set up a grassroots sort of organization/group that later evolved into a church[es]. Jesus had power/authority from on high or within himself to perform miracles and to teach truth.
The only record we have of that this happened this way is one shaped by man's hand. There are other records, also shaped by man's hand, that tell a different story.
Baptism was a gateway ordinance into the congregation of like believers.
But not into heaven.
The Holy Ghost performed an important part in helping early believers come to a sure knowledge.
Anecdotal reports with no evidence to back them up.
Sacrament was practiced among the believers.
And among non-believers, if one's definition of sacrament is broad enough.
God himself appeared to some chosen individuals and communicated knowledge to them apart and away from the general congregation.
Anecdotal reports again. Again with no evidence to back them up.
Sin was eschewed and repentance was part and parcel of following Jesus. And so on.
Man is incapable of eschewing sin. If he could eschew sin, there would be no need for Jesus.
To put it simply, Jesus brought the gospel/good news of salvation to mankind.
You forgot some important parts (love thy neighbor, turn the other cheek, love your enemies, etc), but that's to be expected, since the church doesn't emphasize that part of the gospel enough.
Where is that good news/gospel and the power/authority of God most likely to be found in modern times if it is to be found at all?
Sure as heck not in the LDS church. We're too worried about earring holes, teased hair, and wearing the right clothes to be worried about actually living the gospel of Jesus Christ. We spend our money on shopping malls, city parks, and big marble buildings instead of taking care of the poor and afflicted, service to others, and ministering to those in need. We personify the materialism Christ rejected. But that's okay... we've got a prophet.