Before the decree bring forth - God’s word is full (as it were) of the event which it foretelleth; it contains its own fulfillment in itself, and “travaileth” until it come to pass, giving signs of its coming, yet delaying until the full time. Time is said to bring forth what is wrought in it. “Thou knowest not, what a day shall bring forth.”
Before the day pass as the chaff - Or, parenthetically, “like chaff the day passeth by.” God’s counsels lie wrapt up, as it were, in the womb of time, wherein He hides them, until the moment which He has appointed, and they break forth suddenly to those who look not for them. The mean season is given for repentance, that is, the day of grace, the span of repentance still allowed, which is continually whirling more swiftly by; and woe, if it be fruitless as chaff! Those who profit not by it shall also be as chaff, carried away pitilessly by the whirlwind to destruction. Time, on which eternity hangs, is a slight, uncertain thing, as little to be counted upon, as the light dry particles which are the sport of the wind, driven uncertainly here and there. But when it is “passed,” then “cometh,” not “to” them, but “upon” them, from heaven, overwhelming them, “abiding upon” John 3:36 them, not to pass away, “the heat of the anger of Almighty God.” This warning he twice repeats, to impress the certainty and speed of its conming Genesis 41:32. It is the warning of our Lord, “Take heed, lest that day come upon you unawares” Luke 21:34.