The Alpha course is an evangelistic course which seeks to introduce the basics of the Christian faith through creating an easy to enter context in which to hear a series of talks (either live or on video) and an opportunity for wide-ranging discussion. It is described by its organisers as “an opportunity to explore the meaning of life”. Alpha courses are being run in churches, homes, workplaces, prisons, universities and a wide variety of other locations. The course is being run around the world by all major Christian denominations.
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Check out this video: What is the Alpha Course?