Matthew 15–17 reveals Christ’s authority over tradition, demons, nature, death, and unbelief, while unveiling the cross, the church, and His glory.
Matthew 16:18–19 explained from a conservative Baptist KJV view: Peter confessed Christ, the Rock, as Jesus builds His church.
Leaven in the Bible is not always sin, but Scripture often uses it as a symbol of corruption, false doctrine, and evil spread.