Thou shalt speak all that I command thee: and Aaron thy brother shall speak unto Pharaoh, that he send the children of Israel out of his land. -Exodus 7:2

The first thing the Lord did to prove His persevering grace was to commission Moses again. So the Lord God, in everlasting mercy, says to His minister, “You have to preach the gospel again to them. Again proclaim My grace.” It seems a terrible thing to have to pour our souls into deaf ears. Yet I shall not give it up, for I have done it with some here for nearly thirty-three years, and I may as well go on. Why should I lose so much labour? I will try again, like Peter, who, after toiling all night and taking nothing, yet let down the net at the Lord’s bidding. One of these days those dead ears will be made to live. God in mercy says, “Go on with it. As long as there is breath in your body, tell them to believe in My Son, and they shall live. Tell them till you die that ‘He that with his mouth confesseth, and with his heart believeth that God hath raised Christ from the dead shall be saved.'”

I believe that God is saying to His church “You have to do it. You have to gather out Mine elect out of every nation under heaven”…To the eye of reason there is no use in preaching to men dead in sin. I freely admit that; but if it is a commission from God, then it is not ours to raise questions, but to do as we are bidden. God has commissioned His servants to preach the gospel to every creature. Whatever those creatures may be, we are to say to them, “He that believeth and is baptized shall be saved; but he that believeth not shall be dammed.” This is our message and our mission, and we are just to tell the truth, and leave God to apply it to the heart. Oh that He may give us grace to tell out the gospel, and to keep on doing it till He has brought His own elect out of the bondage of sin and Satan, and saved them with an everlasting salvation! ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2026.cfm