and if you are sure that you are a guide to the blind, a light to those who are in darkness,

And he did not weaken in faith when he considered his own body, which was as good as dead since he was about a hundred years old, or when he considered the barrenness of Sarah's womb.

that I have great sorrow and unceasing anguish in my heart.

For this is what the promise said: "About this time I will return and Sarah shall have a son."