Let the house of Aaron now say ... - Compare Psalm 115:10. The ministers of religion. They are appointed to serve God; to lead in his worship; to defend his truth; to keep up faith in the truth of religion. They are, therefore, interested in my case, and may derive from it a new proof of the merciful character of God which they may employ, not only for their own encouragement in personal piety, but in the duties of their office. My case furnishes a new argument, of which they can make use in defending the truth, and in illustrating the power of religion.

The house of Aaron - The priesthood is still preserved, and the temple worship restored.

Let the house of Aaron now say, that his mercy endureth for ever. The priests and Levites that blessed the people, and taught them the knowledge of divine things; but not these literally, at least not only these, since the priesthood of Aaron is changed, and the law of it abrogated, and all believers are now priests unto God, and offer up spiritual sacrifices to him; and particularly the sacrifice of praise for his grace and mercy, the perpetuity of which they should publish and proclaim all abroad.

Let the house of Aaron now say, that his mercy endureth for ever.

118:1-18 The account the psalmist here gives of his troubles is very applicable to Christ: many hated him without a cause; nay, the Lord himself chastened him sorely, bruised him, and put him to grief, that by his stripes we might be healed. God is sometimes the strength of his people, when he is not their song; they have spiritual supports, though they want spiritual delights. Whether the believer traces back his comfort to the everlasting goodness and mercy of God, or whether he looks forward to the blessing secured to him, he will find abundant cause for joy and praise. Every answer to our prayers is an evidence that the Lord is on our side; and then we need not fear what man can do unto us; we should conscientiously do our duty to all, and trust in him alone to accept and bless us. Let us seek to live to declare the works of God, and to encourage others to serve him and trust in him. Such were the triumphs of the Son of David, in the assurance that the good pleasure of the Lord should prosper in his hand.