while it closes in Psalm 150 with a call for universal praise.3 It commences with the challenge of walking diligently in the ways of the LORD, while it closes with universal adoration of him. This first key starts by contrasting the two ways in which people can go. As the opening song of the whole collection it is intended to challenge readers as to their commitment to the LORD and to his law. It points to two ‘ways’, just as Jesus did in the Sermon on the Mount (Matt. 7:13–14).