In the line of St John
The life of St Irenaeus was almost within touching distance of the disciples: he was a follower of St Polycarp, who himself learnt at the feet of St John. Born around 125, possibly in modern-day Turkey, to a Christian family, Irenaeus became Bishop of Lyons. He is best known for his writings, which were principally directed against the Gnostic heresy.

Gnostic deceptions
The Gnostic movement, known as Valentinianism, achieved considerable success in the 2nd century. Like all Gnostic systems, it was elitist and bafflingly complex.