The faithful soul, pouring out without ceasing those prayers which are supplied to us by God’s Spirit in gracious provision for our infirmities, enjoys communion with God Himself as he shares in the understandings of the things of the gospel. By practice in prayer, he increases daily in fellowship with his Lord while his soul within him testifies to the extent of its progress, while assurance of saving knowledge waxes stronger daily. Such a soul – such a gospel student – is gradually admitted in the secrets of God’s covenant, plighted to the saints in Christ Jesus, while all the time it is growing more and more into the image of Him who is our Head and is Lord of all.
– John Owen –
from Biblical Theology – The History of Theology from Adam to Christ, page 702; Soli Deo Gloria Publications 1994