Verse 12 This is the law, &c.; that is, this principle is the foundation of all the detailed instructions of the ancient scriptures, in respect to the relative duties of man. Matthew 7:13,14. Strait; narrow, difficult to be entered. It requires watchfulness and a constant struggle to resist temptation, and to live in obedience to the precepts of Christ. And there are comparatively very few who do thus live, and they are consequently here represented as travelling in an unfrequented path. The great multitude give themselves up to sin. They are therefore represented as travelling the broad highway.