Galatians 6:7 - Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
Proverbs 16:18 - Pride [goeth] before destruction, and an haughty spirit before a fall.
Luke 18:9-14 - And he spake this parable unto certain which trusted in themselves that they were righteous, and despised others
Matthew 7:15-20 - Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.