How do we know the doctrine of martyrdom is true?

The truth of martyrdom as a doctrine is anchored in the testimony of Scripture, particularly in Revelation. In Revelation 6:9-10, the martyrs are described vividly as having been slain for their service to God and their witness to Jesus Christ. This reflects a broader biblical understanding that martyrs testify to their faith in extreme circumstances, often resulting in death for their beliefs. The concept of martyrdom extends beyond physical death; it encompasses the willingness to suffer persecution for the sake of Christ's name.