If we study Divine subjects merely as ministers, they will produce no salutary effect. We may converse with the most impressive truths, as soldiers and surgeons do with blood, till they cease to make any impression upon us. We must meditate on these things as Christians, first feeding our own souls upon them, and then imparting that which we have beleived and felt to others; or, whatever good we may do to them, we shall receive none ourselves. Unless we mix faith with what we preach, as well as with what we hear, the word will not profit us.
Andrew Fuller, Preaching Christ in The Complete Works of Andrew Fuller, 1:501.