These two verses which I venture to lay side by side present in a very remarkable way this characteristic. It is not by accident that they stand where they do, the first and last verses of the whole collection, enclosing all, as it were, within a golden ring, and bending round to meet each other. They are the summing up of the whole purpose and issue of God's revelation to men. The first and second psalms echo the two main portions of the old revelation--the Law and the Prophets. The first of them is taken up with the celebration of the blessedness and fruitful, stable being of the man who loves the Law of the Lord, as contrasted with the rootless and barren life of the ungodly, who is like the chaff. The second is occupied with the contemplation of the divine 'decree' by which the coming King is set in God's 'holy hill of Zion,' and of the blessedness of 'all they who put their trust in Him,' as contrasted with the swift destruction that shall fall on the vain imaginations of the rebellious heathen and banded kings of earth. The words of our first text, then, may well stand at the beginning of the Psalter. They express the great purpose for which God has given His Law. They are the witness of human experience to the substantial, though partial, accomplishment of that purpose. They rise in buoyant triumph over that which is painful and apparently opposed to it; and in spite of sorrow and sin, proclaim the blessedness of the life which is rooted in the Law of the Lord. The last words of the book are as significant as its first. The closing psalms are one long call to praise--they probably date from the time of the restoration under Ezra and Nehemiah, when, as we know, 'the service of song' was carefully re-established, and the harps which had hung silent upon the willows by the rivers of Babylon woke again their ancient melodies. These psalms climb higher and higher in their rapturous call to all creatures, animate and inanimate, on earth and in heaven, to praise Him. The golden waves of music and song pour out ever faster and fuller. At last we hear this invocation to every instrument of music to praise Him, responded to, as we may suppose, by each, in turn as summoned, adding its tributary notes to the broadening river of harmony--until all, with gathered might of glad sound blended with the crash of many voices, unite in the final words, 'Let every thing that hath breath praise the Lord. Praise ye the Lord.' I. We have here a twofold declaration of God's great purpose in all His self-revelation, and especially in the Gospel of His Son. Our first text may be translated as a joyful exclamation, 'Oh! the blessedness of the man--whose delight is in the law of the Lord.' Our second is an invocation or a command. The one then expresses the purpose which God secures by His gift of the Law; the other the purpose which He summons us to fulfil by the tribute of our hearts and songs--man's happiness and God's glory.