The LORD asked Abraham, “Why did Sarah laugh? Does she doubt that she can have a child in her old age?
So she laughed and said to herself, “Now that I am worn out and my husband is old, will I really know such happiness?”
I am the LORD! There is nothing too difficult for me. I'll come back next year at the time I promised, and Sarah will already have a son.”
and Sarah said, “God has made me laugh. Now everyone will laugh with me.
Who would have dared to tell Abraham that some day I would have a child? But in his old age, I have given him a son.”
No one had to tell him what people were like. He already knew.