Charles H. Spurgeon on Psalms 148:14

He also exalteth the horn of his people. He hath made them strong, famous, and victorious. His goodness to all his creatures does not prevent his having a special favour to his chosen nation: he is good to all, but he is God to his people. He lifts up the down trodden, but he in a peculiar manner lifts up his people. When they are brought low he raises up a horn for them by sending them a deliverer; when they are in conflict he gives them courage and strength, so that they lift up their horn amid the fray; and when all is peaceful around them, he fills their horn with plenty, and they lift it up with delight. The praise of all his saints. He is their glory: to him they render praise; and he by his mercy to them evermore gives them further reasons for praise, and higher motives for adoration. He lifts up their horn, and they lift up his praise. He exalts them, and they exalt him. The Holy One is praised by holy ones. He is their God, and they are his saints; he makes them blessed, and they bless him in return.

Even of the children of Israel. The Lord knoweth them that are his. He knows the name of him with whom he made a covenant, and how he came by that name, and who his children are, and where they are. All nations are bidden in Ps 148:11 to praise the Lord; but here the call is specially addressed to his elect people, who know him beyond all others. Those who are children of privilege should be children of praise. A people near unto him, near by kin, and near by care; near as to manifestation and near as to affection. This is a highly honourable description of the beloved race; and it is true even more emphatically of the spiritual Israel, the believing seed. This nearness should prompt us to perpetual adoration. The Lord's elect are the children of his love, the courtiers of his palace, the priests of his temple, and therefore they are bound beyond all others to be filled with reverence for him, and delight in him. Praise ye the Lord, or, Hallelujah. This should be the Alpha and Omega of a good man's life. Let us praise God to the end, world without end. The field of praise which lies before us in this Psalm is bounded at beginning and end by landmarks in the form of Hallelujahs, and all that lieth between them is every word of it to the Lord's honour. Amen.