In his book Psalms of the Heart, George Sweeting illustrated a great truth from the experience of two Moody Bible Institute graduates, John and Elaine Beekman. God called them to missionary work among the Chol Indians of southern Mexico. Sweeting reports that they rode mules and traveled by dugout canoes to reach this tribe. They labored 25 years with other missionaries to translate the New Testament into the language of the Chol Indians. Today the Chol Church is thriving. More than 12,000 Christians make up the Chol Christian community, which is financially self-supporting. What's interesting is that when the missionaries came, the Chol Indians didn't know how to sing. With the coming of the gospel, however, the believers in the tribe became known as "the singers". "They love to sing now," Sweeting commented, "because they have something to sing about."