Though he was nearly a hundred years old, yet his faith did not fail him, even when he thought of his own body, then utterly worn out, and remembered that Sarah was past bearing children.

For these words are the words of a promise-'About this time I will come, and Sarah shall have a son.'

Again, it was faith that enabled Sarah to conceive (though she was past the age for child-bearing), because she felt sure that he who had given her the promise would not fail her.

as Sarah did, who obeyed Abraham, and called him master. And you are her true children, as long as you live good lives, and let nothing terrify you.