G. Campbell Morgan had already enjoyed some success as a preacher by the time he was 19 years old. But then he was attacked by doubts about the Bible. The writings of various scientists and agnostics disturbed him (e.g., Charles Darwin, John Tyndall, Thomas Huxley, and Herbert Spencer). As he read their books and listened to debates, Morgan became more and more perplexed. What did he do? He cancelled all preaching engagements, put all the books in a cupboard and locked the door, and went to the bookstore and bought a new Bible. He said to himself, "I am no longer sure that this is what my father claims it to be--the Word of God. But of this I am sure. If it be the Word of God, and if I come to it with an unprejudiced and open mind, it will bring assurance to my soul of itself." The result? "That Bible found me!" said Morgan. The new assurance in 1883 gave him the motivation for his preaching and teaching ministry. He devoted himself to the study and preaching of God's Word.