“It hurts so good!” This common expression highlights the contrast between pain and pleasure. Most people are hard-wired to avoid pain at any cost. But sometimes that which causes pain is also productive. A pastor I know left behind a little black binder with notes he made during more than 50 years of ministry. At a denominational conference in 1959 (the Ohio Yearly Meeting of Friends, a.k.a. Quakers) he wrote this quote from Paul Rees, the speaker: “There…