2 Look unto Abraham your father, and unto Sarah that bare you; for when he was but one I called him, and I blessed him, and made him many.

Matthew Henry's Commentary on Isaiah 51:2

Commentary on Isaiah 51:1-3

(Read Isaiah 51:1-3)

It is good for those privileged by the new birth, to consider that they were shapen in sin. This should cause low thoughts of ourselves, and high thoughts of Divine grace. It is the greatest comfort to be made serviceable to the glory of God. The more holiness men have, and the more good they do, the more gladness they have. Let us seriously reflect upon our guilt. To do so will tend to keep the heart humble, and the conscience awake and tender. They make Christ more precious to the soul, and give strength to our attempts and prayers for others.