To preach the Gospel requires that the preacher should believe that he is sent to those whom he is addressing at the moment, because God has among them those whom He is at the moment calling; it requires that the speaker should expect a response.
“With reasonable men, I will reason; with humane men I will plead; but to tyrants I will give no quarter, nor waste arguments where they will certainly be lost.”
“It is surely harmful to souls to make it a heresy to believe what is proved.”