God has a way of taking our moments of doubt and our failings and turning them around. When the three men were visiting with Abraham, Sarah overheard that she would have a son within the year (18:10). This was what the couple had been waiting twenty-five years for. But instead of celebrating and worshiping God, Sarah laughed to herself (18:12). When she was confronted for laughing, she denied it out of fear (18:15). But within the year, Sarah would find out that nothing is impossible for the Lord (18:14).
When we reach Genesis 21, we read that the Lord came to Sarah and did what He had promised; she became pregnant and had a son at the appointed time (vv. 1-2). The couple named their son Isaac, which means “laughter,” and Sarah declared that God had made her laugh and everyone who heard of her joy would laugh with her (v. 6). God had truly turned Sarah’s skeptical laughter into joyful laughter. Surely every time Sarah called her son to dinner or introduced him to others, she was reminded of how God had turned her doubts upside down.
How have you experienced God’s kindness and grace in your times of doubt and disobedience?