Charles Ellicott Commentary Job 37:6

"For he saith to the snow, Fall thou on the earth; Likewise to the shower of rain, And to the showers of his mighty rain." — Job 37:6 (ASV)

For He says to the snow. —All the operations of nature obey the command of God—the snow, the gentle showers, the drenching downpour. By means of these, He seals up the hand of every man, obstructing and impeding their works and movements, so that all the men whom He has made may know it or know Him.

This is the plain meaning, which the Authorized Version gives somewhat less clearly. Men may learn from these things that they and their works are under the control of God. They are not the entirely free agents they suppose.