¹⁹ Abraham did not become weak in his faith. He accepted the fact that he was past the time when he could have children. At that time Abraham was about 100 years old. He also realized that Sarah was too old to have children. ²⁰ But Abraham kept believing in God’s promise. He became strong in his faith. He gave glory to God. ²¹ He was absolutely sure that God had the power to do what he had promised.