Who hath divided a watercourse for the overflowing of waters, or a way for the lightning of thunder; Divided a water-course - The original תעלה tealah, from עלה alah, to ascend, may signify rather a cloud, or clouds in general, where the waters are stored up. I cannot see how the overflowings or torrents of water can be said to ascend any other way than by evaporation; and it is by this Divine contrivance that the earth is not only irrigated, but even dried; and by this means too much moisture is not permitted to lie upon the ground, which would not only be injurious to vegetation, but even destroy it. But query, may not a waterspout be intended?
A way for the lightning of thunder - "A path for the bolt of thunder." God is represented as directing the course even of the lightning; he launches the bolt, and makes the path in which it is to run. To grasp, manage, and dart the thunderbolt or lightning, was a work which heathenism gave to Jupiter, its supreme god. None of the inferior deities were capable of this. But who can thunder with a voice like the Almighty? He is The Thunderer.