The Chief End of Man (15)
21 1The LORD visited Sarah as he had said, and the LORD did to Sarah as he had promised. 2And Sarah conceived, and bore Abraham a son in his old age at the time of which God had spoken to him. 3Abraham called the name of his son who was born to him, whom Sarah bore him, Isaac. 4And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. 5Abraham was a hundred years old when his son Isaac was born to him.
Note the symmetry that exists here between the LORD’s faithfulness towards Sarah and Abraham and their response. At Isaac’s eighth day Abraham circumcised him just as God had commanded.
We too often pass over Abraham’s faithfulness to God as a matter of settled, but dry, fact. In point of fact, this response is nothing less than the beating heart that has sent the lifeblood of faith out into this world for thousands of subsequent years.
6 And Sarah said, “God has made laughter for me; every one who hears will laugh over me.” 7And she said, “Who would have said to Abraham that Sarah would suckle children? Yet I have borne him a son in his old age.”
When last Sarah laughed about this birth the incident ended in fear (see Genesis 18:15). She had suffered what at that time was considered the shame of barrenness for almost 90 years. But with God’s working of His will, and, finding this faithful response:
You turned my wailing into dancing;
you removed my sackcloth and clothed me with joy,
that my heart may sing to you and not be silent.
O LORD my God, I will give you thanks forever. (Psalm 30 :11,12, NIV)