Helmut Thielicke wrote in his book Encounter with Spurgeon concerning the training of pastors:
For Spurgeon the really determinative foundation of the education of preachers was naturally this work on the spiritual man. The education of preachers must not be directly pragmatic; it must not be immediately directed to preaching as its goal. Otherwise the process of education becomes an act of mere training, the teaching of technical skills. The preacher must read the Bible without asking in the back of his mind how he can capitalize homiletically upon the texts he studies. He must first read it as nourishment for his own soul. (p. 10)
Some wise words for all who have been called to preach and teach.