…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

…for I called him alone, and blessed him, and increased him. – Isaiah 51:2

Think, my brethren, of the power for good or evil which may be enshrined in a single human life. What mischievous results may come of one man! One sinner destroyeth much good, and if there were but one person left who had knowledge of the ways of vice and the words of blasphemy that one man would suffice to infect the race with his abominations. If evil be so mighty, is not good with God in it quite as powerful? We may rightly measure quantities in reference to many things, but with others it is absurd. It would be ridiculous to measure the power of fire by the quantity which burns on the hearth. Give us fit materials and a single match, and you shall see what fire can do. If ordinary fire, that may so readily be extinguished, is thus powerful, who shall venture to measure the power of the fire from heaven, which neither men nor devils can quench, the fire which fell at Pentecost, and burns among us still. Ye carry fire, ye servants of God; ye work with a heaven-sent force of boundless energy. Why, therefore, should you despair? If all the lights in the world were put out except a solitary lamp, there is enough fire in one wick to kindle all the lamps in the universe. What inch of ground remains for despair to stand upon?

Abraham was distinguished from other men only by the grace of God. What grander difference can there be than that which is established by the existence of faith in the heart? Thus Abraham was in the fullest sense a lone man, unsupported by any of those outward distinctions which enable some men to do more than others. ~ C.H. Spurgeon

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

Look unto Abraham…for I called him alone, and blessed him, and increased him. – Isaiah 51:2

Observe that Abraham was but one man.

I bless God that all my hope of salvation hangs upon the divine ministry of the One Man. Is not Christ, as the servant of God, the very pattern of all ministries which are of God? …When the earth was utterly corrupt God conserved the race by a solitary preacher of righteousness, who prepared an ark for the saving of his house. See how one Joseph saved whole nations from famine, and one Moses brought out a race from bondage. Who was there to keep Israel right when Moses fell to sleep but the one man Joshua? What were the prosperous times in the era of the Judges but days when one man was to the front as a leader? When all the rest hid away in dens and caves, some Barak or Gideon, or Jephthah, or Samson came boldly forward and delivered Israel…What was there but one man in the days of David? The Philistines had still triumphed over the land if the one lad had not brought back Goliath’s head, and if the one man had not again and again smitten the uncircumcised in the name of the Lord. Beloved, if we should ever be reduced, as we shall not be, to one man, yet by one man will God preserve His church, and work out His great purposes. I hope we shall never go into our chamber, and shut the door, and cry with Elias, “I only am left, and they seek my life!” No, my brother, there are more faithful men in this world than you. The Lord has yet reserved to Himself His thousands that have not bowed the knee to Baal. We are this day, not one man, but many, and we all desire to live for the glory of God, and for the spread of His gospel. ~ C.H. Spurgeon

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

Look unto Abraham…for I called him alone, and blessed him, and increased him. – Isaiah 51:2

The same Spirit who called Abraham by a supernatural voice can call others by the word of truth…”Omnipotence hath servants everywhere.” Let us never dream that the God of Abraham is short of means for calling out chosen men to build up His church. Surely Christian people should never doubt the power of God to raise up lights in dark places when we remember that the greatest preacher of the gospel, namely, the apostle Paul, was drafted into the army of Christ from the ranks of His direst foes. The proud Pharisee, a fanatic of the fanatics, embittered against Christ, and persecuting His people, became the earnest advocate of Christ Jesus. Aforetime his breath was threatening with slaughter, yet on the road to Damascus he was conquered and transformed. As a lion roareth over his prey, so did Paul rejoice that the saints in Damascus were now in his power; but the Lord struck him down, and turned the lion to a lamb, and henceforth where sin abounded grace did much more abound. First in the ranks of Christian heroes stands the man who called himself the chief of sinners because he persecuted the church of God. My brethren, as Luther came from among the monks, so out of Rome, yea, from the Vatican itself, can God, if He wills, call another Luther. The darkness of the times cannot forbid it, for God is Light. The weakness of the church cannot hinder it, for all power belongeth unto God. ~ C.H. Spurgeon

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