Matthew 7:18

A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit--Obvious as is the truth here expressed in different forms--that the heart determines and is the only proper interpreter of the actions of our life--no one who knows how the Church of Rome makes a merit of actions, quite apart from the motives that prompt them, and how the same tendency manifests itself from time to time even among Protestant Christians, can think it too obvious to be insisted on by the teachers of divine truth. Here follows a wholesome digression.

This chapter continues and concludes Christ's sermon on the mount, which is purely practical, directing us to order our conversation aright, both toward God and man; for the design of the Christian religion is to make men good, every way good. We have, I. Some rules concerning censure and reproof (Mat 7:1-6). II. Encouragements given us to pray to God for what we need (Mat 7:7-11). III. The necessity of strictness in conversation urged upon us (Mat 7:12-14). IV. A caution given us to take heed of false prophets (Mat 7:15-20). V. The conclusion of the whole sermon, showing the necessity of universal obedience to Christ's commands, without which we cannot expect to be happy (Mat 7:21-27). VI. The impression which Christ's doctrine made upon his hearers (Mat 7:28, Mat 7:29).

7:18 Spiritual rebirth is absolutely necessary if one is to produce the good fruit that Jesus demands. Good works flow from faith; good works and faith cannot be separated (see Jas 2:14-26).