1 Chronicles 29:13,14 - Joseph Benson’s Commentary on the Old and New Testaments

Now therefore, our God, we thank thee The more we do for God, the more we are indebted to him for the honour of being employed in his service, and for grace to enable us in any measure to serve him. Doth he therefore thank that servant? said Jesus. No: but that servant has a great deal of reason to thank him. Who am I, and what is my people? David was the most honourable person, and Israel the most honourable people, then in the world; yet thus he speaks of himself and them, as utterly unworthy of the divine cognizance and favour. David now appeared very great in the eyes of men, presiding in an august assembly, appointing his successor, and making a noble present to the honour of God; and yet, being little and low in his own eyes, he asks, Who am I, O Lord! that we should be able to offer so willingly That thou shouldest give us both riches to make such an offering, and a willing heart to offer them, both which are the gifts and fruits of thy grace and mercy to us. God works ill his people both to will and to do, and it is a great instance of the power of his grace in us to be able to do his work willingly. Of thine own have we given thee We return only what we have received, and therefore only pay a debt, or rather, the small part of a debt due to thee. Thus we ought to give God all the glory of all the good that is at any time done by ourselves or others. Our own good works must not be the matter of our pride, nor the good works of others of our flattery, but both the matter of our praise; for certainly it is the greatest honour and pleasure in the world faithfully to serve God.