Our three-year-old grand-daughter Piper is a fount of illustrative material, so when our daughter called the other day with another “Piper-ism” I wasn’t surprised. Evidently, they’d had sort of a tough day. Piper looked at her mother—hand on hip—and said, “Mommy, I love you, but sometimes it’s hard.” Seriously? How can you not chuckle at that declaration? I’m guessing her …