The dispute over the nature of revelation was one of the significant theological debates of the second century. In the polemic between Irenaeus of Lyons and the representatives of the Valentinian school, two different models of understanding revelation emerge. Texts associated with the Valentinian tradition, especially the Gospel of Truth and the Tripartite Tractate, present revelation primarily as knowledge (gnosis) that overcomes ignorance and enables the discovery of humanity’s spiritual origin.
In Adversus haereses, Irenaeus opposes this view by presenting revelation as an event within the history of salvation accomplished in Christ and transmitted by the apostles to the entire Church. In his interpretation, revelation is not knowledge reserved for a select few but a reality preserved in the public tradition of the apostolic Churches, in their common rule of faith, and in episcopal succession. The polemic with the Valentinians thus leads to a clearer articulation of the conviction that Christian revelation has a historical and public character.