For as those who claim to know nothing about ultimate reality are called agnostic (literally, “not-knowing”), the person who does claim to know such things is called gnostic (“knowing”). But gnosis is not primarily rational knowledge. The Greek language distinguishes between scientific or reflective knowledge (“He knows mathematics”) and knowing through observation or experience (“He knows me”), which is gnosis. As the gnostics use the term, we could translate it as “insight,” for gnosis involves an intuitive process of knowing oneself. And to know oneself, they claimed, is to know human nature and human destiny.
The Gnostic Gospels