Again, it may properly be said of the man who is truly regenerated, and is fashioned anew into the image of Christ, that he is always suffering, and yet always happy. The natural and necessary opposition between the state of his own soul and the condition of things around him causes affliction. The inhabitant of a dying body, and surrounded by a sinning world, pierced by the thorns of the flesh and by the arrows of Satan, the law of his outward position and the still lingering trials of his fallen nature necessarily constitute him, till his last footstep on this stricken and bleeding earth, "a man of sorrows and acquainted with grief." But if, in some departments of his mental being, he is always suffering, in others he is always happy. And he is so, because, being born of God and made a partaker of the divine nature, he cannot be otherwise. In the inmost recesses of the soul, in that part which is central and controlling to all the rest, faith stands unshaken; faith which gives sight to the blind and strength to the weak; faith which proclaims sunshine after the storm, victory after the contest, a present God and everlasting rest.
— edited from A Treatise on Divine Union (1851) Part 8, Chapter 8 by Thomas Cogswell Upham. His blog is managed by Craig L Adams and can be found here: http://thomascupham.blogspot.com