Genesis 21:6 - Clarke's commentary and critical notes on the Bible

And Sarah said, God hath made me to laugh, so that all that hear will laugh with me. God hath made me to laugh - Sarah alludes here to the circumstance mentioned Genesis 18:12; and as she seems to use the word to laugh in this place, not in the sense of being incredulous but to express such pleasure or happiness as almost suspends the reasoning faculty for a time, it justifies the observation on the above-named verse. See a similar case in Luke 24:41, where the disciples were so overcome with the good news of our Lord's resurrection, that it is said, They believed not for joy.