Preaching the word straight from the holy Scripture is the best method use by Jesus and his disciples to equip the church with the TRUTH fully grounded in the holy word of God.

2 Timothy 3:16,17- 16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for [c]instruction in righteousness, 17 that the man of God may be complete, thoroughly equipped for every good work.