The Holy Spirit

The Holy Spirit... the testimony of the Spirit is more excellent than all reason. For God alone is a fit witness to himself in His Word, so also the Word will not find acceptance in men's hearts before it is sealed by the inward testimony of the Spirit. The same Spirit, therefore, who has spoken through the mouths of the prophets must penetrate into our hearts to persuade us that they faithfully proclaim what has been divinely commanded… By this power we are drawn and inflamed, knowingly and willingly, to obey him, yet also more vitally and more effectively than by mere human willing or knowing.