The Leaven of the Pharisees and Sadducees

1. Beware of pious-sounding unbelief, vv.1-4.

i. Pharisees and Sadducees.
ii. Unbelieving question.
iii. Christ addresses their lack of discernment.
iv. Christ addresses their sinful unfaithfulness.

2. Beware of the influence of bad doctrine, vv.5-12.

i. Danger on both sides.
ii. Danger in a little error.
iii. Necessary to identify false doctrine and false teachers.