Gnosticism in the twentieth century captured virtually all seminaries and most churches. Only a few theologians like Van Til have opposed it. Its presuppositions are now basic to the pulpit. One result has been the exclusion of God from the church in the name of God. God is viewed in Darwinian terms, often as, at best, a vague natural force behind history.
Agnosticism is a milder form of gnosticism.
Agnosticism claims it does not know God. Gnosticism implicitly denies the Biblical God. One result of gnosticism is the disappearance of preaching on Genesis chapters 1-11 in most churches. It also means no preaching on God's law, and evasive preaching on the physical resurrection. Christians must break with gnosticism and believe the whole Word of God.