It was a long day at work. But when I got home, it was time to start my “other” job­: being a good dad. Greetings from my wife and kids soon became, “Dad, what’s for dinner?” “Dad, can you get me some water?” “Dad, can we play soccer?”

I just wanted to sit down. And even though part of me really wanted to be a good dad, I didn’t feel like serving my family’s needs. That’s when I saw it: a thank-you card my wife had received from someone at church. It pictured a bowl of water, a towel and dirty sandals. Across…