Gnosticism
Concise Oxford English Dictionary © 2008 Oxford University Press:
Gnosticism /ˈnɒstɪˌsɪz(ə)m/
▶noun a heretical movement of the 2nd-century Christian Church, teaching that esoteric knowledge (gnosis) of the supreme divine being enabled the redemption of the human spirit.
'Gnosticism' also found in these Oxford entries:

