“For as God alone can properly bear witness to his own words, so these words will not obtain full credit in the hearts of men until they are sealed by the inward testimony of the Spirit.  The same Spirit, therefore, who spoke by the mouth of the prophets, must penetrate our hearts, in order to convince us that they faithfully delivered the message with which they were divinely entrusted.”

John Calvin

“My Spirit that is upon you, and my words that I have put in your mouth, shall not depart out of your mouth, or out of the mouth of your offspring, or out of the mouth of your children’s offspring, says the Lord, from this time forth and forevermore.” Isaiah 59:21