…My grace is sufficient for thee… – 2 Corinthians 12:9

Joy! joy! in the house of Abraham and Sarah. What a feast there was that Isaac was born, filling the house with laughter. But he must die! “Get thee up,” said God, “and take thy son, thine only son Isaac, whom thou lovest, and offer him for a burnt offering upon one of the mountains which I will tell thee of.” The grand old man will do it. He will get up early in the morning, and the father and the son will journey together silently; for the aged heart is too full to talk. He believes God, and is sure that even if he should actually slay his son at God’s command the promise would somehow be kept. Abraham could not tell how, but it was no business of his to tell how; he was fully persuaded that what God had promised He was able to perform. God had said to him “In Isaac shall thy seed be called,” and he believed that God could raise Isaac from the dead, or in some other way achieve the promise. Thus he grasped the resurrection. He laid hold on a truth which was deeper than he knew of: by his faith he realised resurrection for Isaac though as yet the Lord Jesus had not shown the way by His own rising from the dead. What a stripping Abraham had endured! Who can describe what would have been the wretchedness of that aged parent if it had not been for his faith!..Likest to God among mortal men art thou Abraham, and therefore well mightest thou be His friend! In thy trial brought to such a stripping we may yet envy thee as we hear the Lord saying, “Now know I that thou fearest God, seeing thou hast not withheld thy son, thine only son from Me.” Now, if in all these trials Abraham was yet blessed, and God’s purposes were accomplished in him, can we not believe that the same God can work by us also, despite our downcastings and humiliations? When we are utterly broken and crushed may not the Lord’s strength be made perfect in our weakness? Let us not question the promise because of our personal deadness and inability, but believe God without wavering, for He hath said, “My grace is sufficient for thee.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1596.cfm