The natural man (1 Cor 2:14) cannot discern the spiritual things that are contained in the bible, and thinks them to be foolishness. What good would a bible do for him, as a matter of fact, it does not do any good to try to teach, or preach to him, if he cannot understand the things of the Spirit. The natural man becomes a spiritual man when God quickens him, while he is yet spiritually dead, to a new life, with the indwelling of the Holy Spirit. Eph 2