Thomas Boston, Works, 3:515-516 (The Crook in the Lot):
The crook in the lot gives rise unto many acts of faith, hope, love, self denial, resignation, and other graces; to many heavenly breathings, pantings, longings, and groanings, which otherwise would not be brought forth. And I make no question but these things, howsoever by carnal men despised as trifling, are more precious in the sight of God than even believers themselves are aware of, being acts of immediate internal worship; and will have a surprising notice taken of them, and of the sum of them, at long run, howbeit the persons themselves can hardly think them worth their own notice at all.
Source: http://www.puritanboard.com/f25/crook-lot-acting-grace-83974/, Comment #1 (Thank You, Reverend Winzer!)
Image: Wooden figure of Job with an affliction of boils, possibly German, 1750-1850