Later, Parham would emphasize speaking in tongues and evangelism, defining the purpose of Spirit baptism as an "enduement with power for service". Parham believed that the tongues spoken by the baptized were actual human languages, eliminating the need for missionaries to learn foreign languages and thus aiding in the spread of the gospel. Some of Parham's followers even traveled to foreign countries in hopes of using glossolalia to communicate with the locals without learning the local languages. But after consistent failed attempts at xenoglossia "many of Parham's followers became disillusioned and left the movement."