Why did Jesus say that people who look back or not fit for the kingdom of God? Does Matthew 16 contradict salvation by grace? How did the things that Jesus did get recorded in the Bible? My niece has decided she wants to be a man. How should I react to this?

Tags: authors, disagreement, Gospels, Jesus, love, Luke 9:62, Matthew 16:23, Matthew 16:24, Matthew 16:24-25, New Covenant, taking a stand