The Pulpit Commentary - Isaiah 40:12
Who hath measured the waters? (comp. Proverbs 30:4 and Job 38:4-6 ). The might of God is especially shown in creation, which Isaiah assumes to be God's work. How infinitely above man must he be, who arranged in such perfection, "by measure and number and weight" (Wis. 11:20), the earth, the waters, and the heavens, so proportioning each to each as to produce that admirable order and regularity which the intelligent observer cannot but note in the material universe as among its chief... read more
The Pulpit Commentary - Isaiah 40:11
God, in Christ, shepherding, Or doing shepherd's work. Here also the first glance seems to be at Cyrus, who, in Isaiah 44:28 , is called God's shepherd; but the after-glance rests on him who could say, "I am the good Shepherd: the good shepherd giveth his life for the sheep." "The change in the fortunes of the Jews is compared by the prophet to a shepherd's seeking his lost sheep, and feeding them again in green pastures" (comp. Jeremiah 31:10 ; Jeremiah 50:19 ; Ezekiel 34:11-16 ).... read more