How beautifully was this blessed man described through the progression of the alphabet, so that his deeds and his rewards were simultaneously recounted! Who would not believe that he beholds the promises bestowed by the sacred Truth? May He lead us to accept what He has already allowed us to hear. This alphabet, by which this poem was completed, undoubtedly points the way to the perfection of wisdom. Through it an understanding of divine affairs is acknowledged, and the fault of ignorance avoided. It is thus clear that the psalms show a variety of differing sweetness, so that our human weakness as we advance in learning cannot be overcome with distaste.
Alleluia. Observe how the psalm as it proceeds explains the heading. Since Alleluia means "Praise the Lord," this is how our true teacher and outstanding doctor began. His words cannot mislead because they are known to flow from the fount of truth. How can any statement be more certain than when he who guides our actions is seen to be his own spokesman?
The prophet David runs briefly through the words of the psalm. In the first section he urges the devoted to discharge praises continually to the Lord, and not to cease proclaiming Him throughout the whole world. In the second part he himself carries out what he urges others to do, so that he is seen to be a true master, teaching not by word but by example.
I. Praise the Lord, ye children: praise ye the name of the Lord. The label children is known to be applied to the simplest and purest, for the