Isa 44:24;[which] is strong: for though it seems a fluid and thin, is very firm and strong, as appears by what it bears, and are contained in it; and therefore is called "the firmament of his power", Ps 150:1;[and] as a molten looking glass; clear and transparent, like the looking glasses of the women, made of molten brass, Ex 38:8; and firm and permanent ; and a glass this is in which the glory of God, and his divine perfections, is to be seen; and is one of the wondrous works of God, made for the display of his own glory, and the benefit of men, Ps 19:1.
Or this may respect the spreading out a clear serene sky, and smoothing it after it has been covered and ruffled with storms and tempests; which is such a wonderful work of God, that man has no hand in.
calkeov ouranov. Pindar. Nem.