Psalms 119:172

My tongue shall speak of thy word - There is a curious distinction here. In the preceding verse he says, "My lips shall utter;" here no reference is made to articulate sounds, except as affixed to musical notes. In this verse he says, "My tongue shall speak;" here articulate and intelligible words are intended. He first utters sounds connected with words expressive of his grateful feelings; in the second he speaks words, principally those which God himself had spoken, containing promises of support, purposes relative to the redemption of his people, and denunciations against their enemies.

My tongue shall speak of thy word - It shall speak of it in the language of praise; it shall speak of it in making it known to others.

For all thy commandments are righteousness - I see this; I feel it; and, therefore, I will speak of it. My impression that thy commandments are all righteous is so deep, that I cannot but speak of them. I must vindicate them; I must praise thee for them.