All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: - 2 Timothy 3:16 (KJV)

For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: - Ephesians 2:8 (KJV)

Now faith is the substance of things hoped for, the evidence of things not seen - Hebrews 11:1 (NKJV)
And "...Faith comes by hearing, and hearing by the word of God." - Romans 10:17 (NKJV)