A nun is walking to church.

As she passes her local store, the shopkeeper says, "Wake up on the wrong side of the bed today, Sister?"

She finds it odd, but keeps walking. On her walk, three more people pass her and say, "Wake up on the wrong side of the bed today, Sister?"

Still baffled as she gets to the church, she walks to another nun at the pulpit and asks, "Why does everyone keep asking me if I woke up on the wrong side of the bed today?!"

The other nun looks down and says, "You're wearing the priest's shoes"