Agnosticism
Agnosticism is the belief that humans cannot know or understand God or anything of a supra-material order. It is not a complete denial of God's existence, but rather a belief in an incurable ignorance; the belief that there is no God is today generally termed atheism. Both positions are condemned by the Orthodox Church, often explicitly, but at all other times implicitly, for being a belief in error for denial (explicit in the case of atheists and some agnostics, implicit in the case of other agnostics) of the truth of God and Jesus Christ.