In thy name shall they rejoice - In thee shall they rejoice, or find their happiness. In thy being; thy perfections; thy protection; thy government; thy favor.
All the day - That is, continually. It is their privilege, and it is their duty to rejoice always. Thou art always the same, and the happiness which is found in thy being and attributes at one time may be found at all times; thy promises are ever the same, and thy people may find happiness in them always. There is no reason why the people of God should not be constantly happy; they who have such a God, and such hopes as they are permitted to cherish, should be so. Compare the notes at Philippians 3:1; notes at Philippians 4:4.
And in thy righteousness - Under thy righteous government; or, in the knowledge of thy righteous character.
Shall they be exalted - See Proverbs 14:34. The effect of that knowledge shall be to exalt or to elevate them in moral character, in happiness, in the esteem of others, and in true prosperity. Compare 1 Timothy 4:8.