Have you ever heard from God? Have you? Has that voice that's got authority ever spoken to you? Have you ever heard Him? When some man was preaching, have you ever heard God speak to you? Just like He said "Lazarus come forth," did He speak to you? That's salvation. We need to shut men up to listening to God. There is no power anywhere on this earth to bring dead people who are dead in trespasses and sin out of their graves and give them life except His voice. Listen to Him.
For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God. (I Cor. 1:18)