Religion: What you do to change you4self to get to God in heaven (outside)
Salvation: What God does to change you (inside)
Nicodemus: A person trying to be good and never getting there.
And saves you through faith in Jesus
Your inside change is seen on the outside
1 Corinthians 6:9, 2 Corinthians 5:17, John 1:13, Ezekiel 36:25, Jeremiah 31, Numbers 21, John 12