2. So manifest are God's perfections, that by very weak instruments He conclusively sets forth His praise. Infants are not only wonderful illustrations of God's power and skill, in their physical constitution, instincts, and early developed intelligence, but also in their spontaneous admiration of God's works, by which they put to shame--
      still--or, silence men who rail and cavil against God. A special illustration of the passage is afforded in Mt 21:16, when our Saviour stilled the cavillers by quoting these words; for the glories with which God invested His incarnate Son, even in His humiliation, constitute a most wonderful display of the perfections of His wisdom, love, and power. In view of the scope of Ps 8:4-8 (see below), this quotation by our Saviour may be regarded as an exposition of the prophetical character of the words.
      sucklings--among the Hebrews were probably of an age to speak (compare 1Sa 1:22-24; Mr 7:27).
      ordained--founded, or prepared, and perfected, which occurs in Mt 21:16; taken from the Septuagint, has the same meaning.
      strength--In the quotation in the New Testament, praise occurs as the consequence or effect put for the cause (compare Ps 118:14).
      avenger--as in Ps 44:16; one desirous of revenge, disposed to be quarrelsome, and so apt to cavil against God's government.

JFB.