Not knowing what you believe (especially on a matter as essential to Christianity as the gospel) is by definition a kind of unbelief. Refusing to acknowledge and defend the revealed truth of God is a particularly stubborn and pernicious kind of unbelief. Advocating ambiguity, exalting uncertainty, or otherwise deliberately clouding the truth is a sinful way of nurturing unbelief. Every true Christian should know and love the truth. – John MacArthur
Christ Alone Wyoming 