How do you know if someone is telling the truth about God? And how should you respond if they are not? Every Christian is responsible for knowing God's Word and for sharing it, but in a world affected by sin, false teaching is everywhere - and some of it comes from leaders inside the church.

This short reference from Ligonier Ministries surveys prominent theological errors, cults and world religions, with each entry setting out what is claimed, where it departs from Scripture, and the harm it does. The aim is to equip a Christian to recognize falsehood quickly and to speak to it, which is a different skill from being able to state the truth.