Overcomers: The 2/3rd Gospel

Why is it that some people seem to experience a truly powerful transformation in their life when they come to know Jesus and yet others seem to not change at all? are we all truly hearing the full gospel message or only part of it? Many have only heard a 2/3rds gospel that we are forgiven our sins because of Jesus' sacrifice and that we go to heaven when we die but what about the here and now?