Faith comes by hearing and hearing by

The Word of God.   Romans 10:17

AND I, Brethren, when I came to you, came not with excellency of speech or of wisdom (means that he depended not on oratorical abilities, nor did he delve into philosophy, which was all the rage of that particular day), declaring unto you the Testimony of God (which is Christ and Him Crucified). 2 For I determined not to know any thing among you (with purpose and design, Paul did not resort to the knowledge or philosophy of the world regarding the Preaching of the Gospel), save Jesus Christ, and Him Crucified (that and that alone is the Message which will save the sinner, set the captive free, and give the Believer perpetual victory). 1 Corinthians 2:1-2

      The Expositors Study Bible KJV