The Second Great Article of Gospel Truth

John Owen reflects on the doctrine of the Holy Spirit in his book, The Holy Spirit: His Gifts and Power

We may observe that the doctrine of the Spirit of God, is the second great article of those gospel truths, in which the glory of God and the good of souls, are most eminently concerned; without the knowledge of which in its truth, and the improvement of it in its power, the first will be altogether useless. For when God designed the great and glorious work of recovering fallen man, and of saving sinners to the praise of the glory of his grace, he appointed in this infinite wisdom two great means thereof: the one was the giving of His Son for them; and the other was, the giving of his Spirit to them. (Owen, p. 43)