The name Christadelphian comes from Greek words meaning "brothers and sisters in Christ". They believe that the Bible is the only present reliable source of knowledge about God and about His purpose with the earth and its inhabitants. They accept no other authority on these matters. They have no governing body on earth. If Christadelphians have a problem, they go to the Bible to find the answer. They believe that men who were inspired by God wrote the Bible. They have a daily Bible reading plan, which covers the Old Testament once and the New Testament twice in one year.

Anyone can become a Christadelphian, if they are prepared to accept and do their best to follow Bible teaching. They try to meet together regularly in groups which they call meetings or Ecclesias, which again comes from the Greek word in the New Testament which is sometimes translated as "church". They believe that people are more important than buildings and meet in all kinds of places, sometimes in their homes. They talk about "going to the meeting" rather than "going to church", because to them, meeting with their brethren and sisters is much more important than the buildings in which they meet. They meet once a week, if possible, to remember the sacrifice of Christ in breaking bread and drinking wine.

Other activities include public meetings about Bible teaching, Sunday Schools, Youth Groups, Bible Study Classes, Bible Reading Groups, residential Bible Schools, Bible Campaigns, Seminars, Distance Learning Courses, Bible Exhibitions, Conferences and Youth Weekends.

There are Christadelphians in countries throughout the world including Africa, America, Australia, Austria, the Bahamas, Bangladesh, Barbados, Brazil, Brunei, Bulgaria, Cambodia, Canada, China, The Czech Republic, Denmark, Eire, Estonia, Fiji, France, Germany, Greece, Grenada, Guatemala, Guinea, Holland, India, Indonesia, Israel, Italy, Jamaica, Japan, Korea, Laos, Latvia, Lithuania, Luxembourg, Malaysia, Mauritius, Micronesia, Moldova, Mongolia, Myanmar, Nepal, New Zealand, Norway, Pacific Islands, Papua New Guinea, Philippines, Poland, Portugal, Puerto Rico, Romania, Russia, Saudi Arabia, Singapore, Spain, Sri Lanka, West Indies, Sweden, Switzerland, Taiwan, Thailand, UK, Ukraine, and Vietnam.

Christadelphians have no paid ministers. They believe that they each have a responsibility to understand Bible teaching and tell anyone else who wants to know about it. Speakers at their meetings and those who conduct their services are all unpaid. Their top priority is to help others understand the truth as taught in the Bible. They receive no financial gain from teaching about the Bible and so can be completely impartial. They are not under pressure to comply with the decrees of any governing body here on earth in order to safeguard their income or pension rights.

Christadelphians believe that they each have a responsibility to try to support themselves and their families by earning a living rather than relying on financial support from others. They do this in many different ways with occupations ranging from manual to professional including lorry drivers, doctors, warehouse operatives, teachers, hospital cleaners, civil servants, bank managers, to name but a few. Many have essential roles as housewives and mothers providing vital support for their families and relying on their husbands as breadwinners. They are all thankful for any material blessings that they receive from their heavenly Father, but try to remember that this life is a probationary period and that financial and material gain is unimportant. The Bible teaches that we should depend on the Lord rather than on our own abilities and that the Lord will provide for our needs.

A wide range of leaflets is available free of charge to help those seeking to understand the Bible. No collections are made at public meetings and collections made at other meetings are voluntary and anonymous. Each member gives according to their income as their conscience guides them.

The most important thing for Christadelphians is to try to understand and follow Bible teaching and to help others to that end.