Others may feel called to go to other countries and become missionaries, which involves evangelism and in some cases humanitarian work among the poor and disadvantaged
The New Testament book, the Acts of the Apostles, explains how the early Christian Church grew in this way and includes, for example, the missionary journeys of the apostle Paul
The aim was to help church members understand the basics of the Christian faith but soon it began to be used as an introduction for those interested in learning about Christianity
Worldwide, millions of people have taken part in this course and other related courses have been started, including relationship and marriage courses for adults and study programmes for young people