For Freedom: Living in the Glory of the Gospel
Issac means "Laughter". Sarah laughs at God when He tells her she will have a son and He will multiply their family and bless the nations through them. It is funny to think of a 90 year old woman giving birth, nursing, and raising a baby. It is equally funny, and amazing, to think of a virgin giving birth, nursing, and raising a son who was God in the flesh. The reality is it is as funny/amazing that God would see fit to save you out of your wretchedness and rebellion as it is that a 90 year old woman would give birth, or a simple virgin would nurse our incarnate God. We who are followers of Christ are children of the promise, don't be a slave to the law (your own ability), the Gospel brings FREEDOM.
Intro: You are free, you just don’t realize it
Breaking down the passage
Two Manifestations of Sarah’s Lack of Faith
his laughter does not so much reflect a total lack of faith as it does a limitation of his faith in what God must do to fulfill his promise.