From Kevin DeYoung's forthcoming book, The Hole in Our Holiness: Filling the Gap Between Gospel Passion and the Pursuit of Godliness (Crossway; August 31, 2012), page 145:
Holiness is the sum of a million little things — the avoidance of little evils and little foibles, the setting aside of little bits of worldliness and little acts of compromise, the putting to death of little inconsistencies and little indiscretions, the attention to little duties and little dealings, the hard work of little self-denials and little self-restraints, the cultivation of little benevolences and little forbearances. Are you trustworthy? Are you kind? Are you patient? Are you joyful? Do you love? These qualities, worked out in all the little things of life, determine whether you are blight or blessing to everyone around you, whether you are an ugly spiritual eyesore or growing up into a good-looking Christian.
Kevin will be one of the plenary speakers at our National Conference this September on sanctification. Visit the event page to learn more and register.