Psychiatrist Robert Coles once noticed a pattern in those who burn out while serving others. The first warning sign is weariness. Next comes cynicism about things ever improving, then bitterness, despair, depression, and finally burnout.

After writing a book about recovering from broken dreams, I once entered a busy season of conference speaking. Helping people find hope after disappointment was richly rewarding, but came at a cost. One day, about to step on stage, I thought I was going to faint. I hadn’t slept well, a vacation hadn’t fixed my weariness, and the thought of hearing another person’s problems afterward filled…