How do we know the story of Peter's denial is true?

The authenticity of Peter's denial is affirmed through its presence in multiple Gospel accounts, particularly in John 18, Matthew 26, and Mark 14. This endurance of the story in Scripture, coupled with the eyewitness aspect of the Gospels, provides a strong basis for its truth. Additionally, the candid nature of these accounts, highlighting the failings of one of Jesus’ closest disciples, suggests a truthful recounting instead of a fabricated narrative meant to glorify the Church. The Gospels aim to expose the depth of our sin and the need for a Savior rather than to portray the apostles as flawless beings.