We have here the contrast between Isaac, the child of promise, and Ishmael, the fruit of unbelief. Ishmael was born as a result of impatience, the failure to wait upon the Lord. In the birth of Isaac, the initiative belonged with God, and the glory belonged to Him. In Christ, we are the children of promise - ‘children born not of natural descent, nor of human decision or a husband’s will, but born of God’ (John 1:13). God did not forget Ishmael. There were blessings for him (17-21). The difference between Ishmael and Isaac is the difference between common grace and saving grace. Many people know much of the grace of God in ‘the common things of life’ (Church Hymnary, 457). There are so many blessings for them to count. Still they fail to appreciate God’s greatest gift - His Son, our Saviour, Jesus Christ. Thank God for this and that and... Jesus!
Here, we see Abraham in his relationship with the world (22-34) and his relationship with the Lord (1-14). Abraham deals honestly and wisely with the pagan king, Abimelech, who acknowledges Abraham's closeness to God - ‘God is with you in all that you do’ (22). We are to be honest and wise in our relationship with the world (Romans 12:17; Colossians 4:5; Ephesians 5:15; 1 Peter 2:12). Our relationship with the world is to be grounded in our relationship with God. In the testing of Abraham, we catch a glimpse of ‘the Lamb of God who takes away the sin of the world’ (John 1:29). Christ is the Lamb whom God will provide (8). In verse 14, we read, ‘On the mount of the Lord it shall be provided’. On Calvary’s hill, Christ died to bring us to God, so that we might learn to live for Him in this world (1 Peter 3:18; 2:24).
After the renewal of God’s promise (15-18), Abraham went to Beersheba (19). He returned to the place where he had ‘called...on the Name of the Lord, the Everlasting God’ (33). This is a good ‘place’ to be, the ‘place’ of calling on the Name of the Lord, the Everlasting God. As we read of the death and burial of Sarah, we must remember this: the Lord is the Everlasting God. The death of Sarah took place in God's time. Her death signified that her work had been done. She had mothered the child of promise. Beyond the death of Sarah, there was the continuing purpose of God. The cave at Machpelah (23:19-20) became the burial place for Sarah, Abraham, Isaac, Rebekah, Jacob and Leah. We see the continuity of history, and we thank God for His continuing faithfulness down through the generations.