In hope he believed against hope, that he should become the father of many nations, as he had been told, “So shall your offspring be.” 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. No unbelief made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God, fully convinced that God was able to do what he had promised. (Romans 4:18-21 ESV)
In his time of waiting, Abraham had a very different experience than we often do, because Abraham did something we fail to do. Here it is: the temptation, in times of waiting is to focus on the thing we are waiting for, all the obstacles that are in the way, our inability to make it happen, and all of the other people who haven’t seemed to wait….all of this increases our feeling of helplessness, our tendency to think our situation is hopeless, and our judgement that waiting is futile…
…his [Abraham’s] focus was on the God who had made this promise. Every day Abraham would get up and remind himself that the God who had made the promises on which he was waiting was absolutely able to deliver them. The God who made heaven and earth would have no trouble causing an old woman to deliver a promised child! Abraham didn’t fill his mind with his own weakness and the seeming futility of the situation. No, he filled his mind again and again with the glory of God’s immeasurable power, and as he did, he grew stronger and stronger in faith.
-Paul Tripp, A Shelter in the Time of Storm