Genesis 21:1-7: True to His Word.
“Now the Lord was gracious to Sarah as he had said, and the Lord did for Sarah what he had promised. 2 Sarah became pregnant and bore a son to Abraham in his old age, at the very time God had promised him. 3 Abraham gave the name Isaac to the son Sarah bore him. 4 When his son Isaac was eight days old, Abraham circumcised him, as God commanded him. 5 Abraham was a hundred years old when his son Isaac was born to him. 6 Sarah said, ‘God has brought me laughter, and everyone who hears about this will laugh with me.’ 7 And she added, ‘Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.’” NIV UK
God keeps His Word: Note the words ‘’As he had said…what he had promised…at the very time God had promised…’’ (1, 2). God is consistently as good as His Word. When He fulfils it, this is always a matter of grace (1). The favour of God is never deserved. But here is a good reason to take your Bible in hand and turn it into prayer. Know what God has promised, and take these unfailing ‘cheques’ to the Bank of heaven to cash them in. ‘’Not one of all the LORD’s good promises to Israel failed; everyone was fulfilled’’ (Joshua 21:45).
God is always on time: ‘’Sarah became pregnant and bore a son to Abraham in his old age, at the very time God had promised him’’ (2). We may not always understand God’s timing, but it’s always right; it’s always good. ‘’He has made everything beautiful in its time’’ (Ecclesiastes 3:11). Abraham and Sarah had quite a wait, but God knew what He was doing.
God does miracles: (see vv.5b/7): Who would have thought that a man of 100 years, and his wife at 90 would (could!) have a baby. Well, they couldn’t – biologically speaking. But God does surprising things.’’Is anything too hard for the LORD?’’ (18:14a).
God brings laughter: Isaac means ‘he laughs.’ God brings seasons of laughter into our lives; times of deep joy. It’s not all laughter of course. There are things we can only learn; only become, through a vale of tears. But lets acknowledge, and be thankful for, every ‘Isaac’ the Lord gives.
God’s grace requires obedience (1, 4): God’s Word to Abraham was not only one of promise, but also it entailed command. Abraham obeyed. The grace of God does not mean we are free to live however we want. Rather we are equipped to behave obediently to the One who saved us, and who blesses us beyond all measure.