Let my mouth be filled - This is an appeal to himself, in view of the goodness of God, to praise him always. See the notes at Psalm 35:28.

With thy praise - With the expressions of praise.

And with thy honor all the day - With such expressions as shall promote thy glory, and make thy honor known.

Let my mouth be filled with thy praise,.... Or "thy praise shall fill my mouth" (x); which shows that his heart was affected with the goodness of God to him, and that he had a deep impression and sense of it upon him; for out of the abundance of the heart the mouth speaks; and for the mouth to be filled with the praise of God, is to speak largely, publicly, and with great delight, in the praise of God, his divine perfections and benefits;

and with thy honour all the day; the excellency of his nature, the glory of his majesty, the honour due unto him, on account of his being, attributes, and blessings of providence and grace; a work to be employed in all the day, evening, morning, and at noon; as often as prayer is made to God, praise, honour, and glory, should be given him; since his mercies are new every morning, and they continue all the day long; his goodness endures for ever.

(x)

Let my mouth be filled with thy praise and with thy honour all the day.

71:1-13 David prays that he might never be made ashamed of dependence upon God. With this petition every true believer may come boldly to the throne of grace. The gracious care of Divine providence in our birth and infancy, should engage us to early piety. He that was our Help from our birth, ought to be our Hope from our youth. Let none expect ease or comfort from the world. Those who love the Lord, often are hated and persecuted; men wondered at for their principles and conduct; but the Lord has been their strong refuge. The faithful servants of God may be assured that he will not cast them off in old age, nor forsake them when their strength fails.