What the word means

“Gnosticism” comes from the Greek word gnosis, which means knowledge. In this setting it does not mean ordinary information. It refers to a kind of insight about the divine, the world and the self that some early religious groups treated as the key to salvation.

The word “gnostic” is often confused with “agnostic.” They are different. An agnostic holds that the existence of God cannot be known. A gnostic, in the historical sense, claimed a special knowledge of the divine.

Where the sources come from

For centuries, most of what was known about gnostic groups came from their critics. Early Christian writers such as Irenaeus of Lyon, who wrote Against Heresies around 180 CE, described these movements in order to argue against them.

That changed in 1945, when a collection of thirteen papyrus books was found near Nag Hammadi in Upper Egypt. Known today as the Nag Hammadi library, it contains around fifty texts in Coptic, including the Gospel of Thomas and the Gospel of Philip. Other works, such as the Gospel of Mary and the Gospel of Judas, survive in separate manuscripts.

Common themes in the texts

The texts are varied, and they do not all teach the same thing. Several share a few recurring ideas: a distinction between a distant, transcendent God and the maker of the material world, a belief that people carry a divine spark, and an emphasis on knowledge rather than belief or ritual as the path to freedom.

Because the writings differ so widely, it is safer to speak of a family of related movements and texts than of one unified religion.

Why scholars debate the label

In recent decades, some historians have argued that “Gnosticism” is a modern category that groups together texts and communities that were less alike than the name suggests. Studies such as Michael Williams’s Rethinking “Gnosticism” (1996) and Karen King’s What Is Gnosticism? (2003) made that case in detail.

Other scholars still find the term useful, provided it is applied carefully. The disagreement is about how to describe the evidence, not about whether the texts exist.

How to read these texts well

A good starting point is to read the primary source in a reliable translation, note when and where the manuscript was copied, and keep that separate from later claims about what the text “really” teaches.

The same method applies to any historical or religious claim: define it, check the source, restore the context and compare the evidence. Our guide on reading historical claims with care walks through each step.