If we are to rely on scripture alone, how would an illiterate person come to know God?
“For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.”
(1 Cor 1:21)
“For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.” (Romans 1:16)