Harry Moorehouse was an English evangelist known as "the Boy Preacher" on account of his youthful looks. Moody wasn't particularly keen, but Moorehouse invited himself to Moody's church in Chicago to preach.
Moorehouse was to have a massive impact on Moody's preaching, but Moody wasn't even present for his first sermon. However his wife, Emma, was.
The following is an extract from the biography D.L. Moody by William R. Moody:
"When I got back Saturday morning I was anxious, to know how he got on. The first thing I said to my wife, when I got into the house, was, 'How is the young Englishman coming along? How do the people like him?'
“'They like him very much.' '
“'Did you hear him'?'
“'Well, did you like him?'
“'Yes, I liked him very much. He has preached two sermons from that verse of John 3:16: "For God so loved the world, that whosoever believeth in Him should not perish, but have everlasting life," and I think you will like him, although he preaches a little differently from you.'
“'How is that?'
“'Well, he tells the worst sinners that God loves them.'
“'Then,' said I, 'HE IS WRONG.'
“'I think you will agree with him when you hear him,' said she, 'because he backs up everything he says with the Bible.'
"Sunday came, and as I went to the church I noticed that everyone brought a Bible. The morning address was to Christians. I had never heard anything quite like it. He gave chapter and verse to prove every statement he made. When night came the church was packed. 'Now, beloved friends,' said the preacher, 'if you will turn to the third chapter of John and the sixteenth verse, you will find my text.' He preached the most extraordinary sermon from that verse. He did not divide the text into ' secondly' and ' thirdly' and ' fourthly'; he just took the whole verse, and then went through the Bible from Genesis to Revelation to prove that in all ages God loved the world. God had sent prophets and patriarchs and holy men to warn us, and then He sent His Son, and after they killed Him, He sent the Holy Ghost. I never knew up to that time that God loved us so much. This heart of mine began to thaw out; I could not keep back the tears. It was like news from a far country; I just drank it in. So did the crowded congregation.
I tell you there is one thing that draws above everything else in this world, and that is love. A man that has no one to love him, no mother, no wife, no children, no brother, no sister, belongs to the class that commits suicide.
"It's pretty hard to get a crowd out in Chicago on a Monday night, but the people came. They brought their Bibles, and Moorhouse began, 'Beloved friends, if you will turn to the third chapter of John and the sixteenth verse, you will find my text, and again he showed on another line from Genesis to Revelation, that God loved us. He could turn to almost any part of the Bible and prove this great fact. Well, I thought that was better than the other one; he struck a higher note than ever, and it was sweet to my soul to hear it.
He just beat that truth down into my heart, and I have never doubted it since. I used to preach that God was behind the sinner with a double-edged sword ready to hew him down. I have done with that. I preach now that God is behind him with love, and he is running away from the God of love.