Q: I admit I’ve always been kind of a “Christmas and Easter” Christian, since those seem to be the only times I manage to make it to church. What would you say to someone like me?

A: The first thing I’d say is that I’m glad you at least make it to church twice a year! Even if God and church don’t mean very much to you right now, at least they must mean something—and in our increasingly secular age, this is noteworthy.

But I’m also glad for another reason: God could use these two days to speak to you and give you a new understanding of His love for you. You see, God may not be very important to...