Visiting a prisoner, I’m in the vending machine line. A lady is on her knees before the machine. She stands, inserts dollar bills, and the machine gives food. My turn. I feed dollar bills. She’s still there, looking skeptical. My bills are rejected. She says, “Them’s old bills. I got new ones.” I trade for crisp bills and survey the cuisine. She says, “Don’t get egg salad or tuna. Past their date.” I thank her and complete my purchase. She wasn’t praying, but looking up at the sell-by dates on the bottom of the packages. I learn every day.