Psalms 103:14

For he knoweth our frame - יצרנו yitsrenu, "our formation;" the manner in which we are constructed, and the materials of which we are made. He knows we cannot contend with him, and if he uses his power against us, we must be crushed to destruction. In all his conduct towards us he considers the frailty of our nature, the untowardness of our circumstances, the strength and subtlety of temptation, and the sure party (till the heart is renewed) that the tempter has within us. Though all these things are against us, yet it must ever be said, whatever use we make of it, "the grace of God is sufficient for us." But alas! alas! who makes use of that sufficient grace? Here, then, is cause for condemnation. But, O amazing mercy! if any man sin, we have an advocate with the Father, Jesus Christ the righteous. And like as a father pitieth his children, so the Lord pitieth them that fear him; for he knoweth our frame, he remembereth that we are but dust. The man who can say, in the face of these Scriptures, Let us sin that grace may abound, is a brute and demon, who has neither lot nor part in this thing.

For he knoweth our frame - Our formation; of what we are made; how we are made. That is, he knows that we are made of dust; that we are frail; that we are subject to decay; that we soon sink under a heavy load. This is given as a reason why he pities us - that we are so frail and feeble, and that we are so easily broken down by a pressure of trial.

He remembereth that we are dust - Made of the earth. Genesis 2:7; Genesis 3:19. In his dealings with us he does not forget of what frail materials he made us, and how little our frames can bear. He tempers his dealings to the weakness and frailty of our nature, and his compassion interposes when the weight of sorrows would crush us. Remembering, too, our weakness, he interposes by his power to sustain us, and to enable us to bear what our frame could not otherwise endure. Compare the notes at Isaiah 57:16.

103:14 Knoweth - The weakness and mortality of our natures, and the frailty of our condition, so that if he should let loose his hand upon us, we should be irrecoverably destroyed.