And last of all He was seen of me also, as of one born out of due time. – 1 Corinthians 15:8

Mr. Tennant, a famous American minister of Whitefield’s time, one of the most earnest and seraphic men who ever proclaimed the gospel of Jesus Christ, had a hearer, who remained unmoved under many a score of his most faithful sermons. Others were saved, but not this man; he seemed unmoved and immovable; but it came to pass, on a certain Sabbath, that a very unusual thing happened. Mr. Tennant had prepared his sermon with great, care, it was what we are wont to call a laborious discourse, into which he had put all the thought and all the pains possible; but he had not been preaching long before his memory completely failed him, his mind refused to work, and, after floundering about for a while, he was obliged to sit down in great confusion, and say that, he could not preach to the people that day. The man I have mentioned, who had never before been impressed under Mr. Tennant’s ministry, was that day called by sovereign grace, as “one born out of due time,” for he was led to see that there was a spiritual and supernatural force which had usually helped the pastor to preach, and that, when this divine influence was withdrawn, he was as weak as other men, and could not speak with power: as he had been accustomed to do. This truth, somehow or other, -for human minds are strangely constituted, and things which have no effect upon certain people very greatly affect others who are present at the same time;- this truth, I say, induced the man to think; thinking, he was led to believe in God, and to trust in the Lord Jesus Christ for the salvation of his soul. He was, without doubt, one “born out of due time.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2663.cfm