From "Lectures on the Doctrine of the Holy Spirit" (by William Kelly), chapter 2 (http://stempublishing.com/authors/kelly/6h_s/hs2_well.html):

Now, if the heart is not satisfied with Christ, how is it? It is because the Holy Ghost is not given to us; it is because I have Him not filling my heart to overflowing with the grace of Jesus; it is because, though divinely attracted to Christ, I have no rest in Him — am still occupied with myself, grovelling in the mud of my nature, instead of being taken up by the power of the Spirit with that Christ who is my life. Thus I am not satisfied with Him only; I am also hankering after what is trash, what is worldly, what is carnal. What is the consequence? It may be, and indeed is, most sorrowful that it should and must be so; for God in Christ in the fulness of grace is not enough! The possession and knowledge of a privilege constitutes an added responsibility, but the first thing is for faith to enter in and possess. Nor will He permit that our hearts should be occupied with these things merely as a matter of testimony, but of our own soul's delight in the object by the power that He has given to us.