A man's words partake of the quality of his own being. The preacher's relation to God is the insignia and credentials of his ministry. These must be clear and unmistakable. Genius, brains, brilliancy, strength, natural gifts do not save. The gospel flows through hearts.
Big hearts make big preachers, humble hearts make powerful preachers.
It was the heart that drew the Son of God from heaven. It is heart that will draw men to heaven. The preacher who has lost this unction has lost the art of preaching. The preacher who never had this unction never had the art of preaching. May the Holy Spirit support and impregnate revealed truth with all the energy of God through us all.