Mum used to tell us kids, “Work hard, and play hard, but never confuse the two.” By this she wanted us to know that while we were working, we should not fritter away the hours by squeezing in distractions and various kinds of play. The result would be poor work combined with guilt feelings for a job poorly done. Similarly, when we were playing we were not supposed to be thinking about work because that would dilute some of the regenerative value of downtime.… Mum’s maxim should be posted on the mirrors of most ministers. [D. A. Carson. Memoirs of an Ordinary Pastor: The Life and Reflections of Tom Carson. Wheaton: Crossway, 2008, p. 93]