For the vision is yet for an appointed time, but at the end it shall speak, and not lie: though it tarry, wait for it; because it will surely come, it will not tarry. (Habakkuk 2:3)
Mercy may seem slow, but it is sure. The Lord in unfailing wisdom has appointed a time for the outgoings of His gracious power, and God's time is the best time. We are in a hurry; the vision of the blessings excites our desire and hastens our longings; but the Lord will keep His appointments. He never is before His time; He never is behind.
God's word is here spoken of as a living thing which will speak and will come. It is never a dead letter, as we are tempted to fear when we have long watched for its fulfillment. The living word is on the way from the living God, and though it may seem to linger, it is not in reality doing so. God's train is not behind time. It is only a matter of patience, and we shall soon see for ourselves the faithfulness of the Lord. No promise of His shall fail; "it will not lie." No promise of His will be lost in silence; "it shall speak." What comfort it will speak to the believing ear! No promise of His shall need to be renewed like a bill which could not be paid on the day in which it fell due-"it will not tarry."
Come, my soul, canst thou not wait for thy God? Rest in Him and be still in unutterable peacefulness.
Faith's Checkbook - November 3, by Charles Spurgeon