Dwight L. Moody, by his own admission, made a mistake on the eighth of October 1871 - a mistake he determined never to repeat.
He had been preaching in the city of Chicago. That particular night drew his largest audience yet. His message was "What will you do then with Jesus who is called the Christ?"
By the end of the service, he was tired. He concluded his message with a presentation of the gospel and a concluding statement: "Now I give you a week to think that over. And when we come together again, you will have opportunity to respond."
A soloist began to sing. But before the final note, the music was drowned out by clanging bells and wailing sirens screaming through the streets. The great Chicago Fire was blazing. In the ashen aftermath, hundreds were dead and over a hundred thousand were homeless.
Without a doubt, some who heard Moody's message had died in the fire. He reflected remorsefully that he would have given his right arm before he would ever give an audience another week to think over the message of the gospel.
-Sermons Illustrated May/June 1989