A poor boy who was selling clothes to pay for his education stopped at a house to ask for food. A young woman there gave him a large glass of milk instead of just water. Years later, when the woman fell gravely ill, the doctor called in for consultation was the same boy, now Doctor Howard Kelly. To repay her kindness from long ago, Doctor Kelly made sure to save her life and waived her medical bills, writing on the invoice "Paid in full with a glass of milk." Acts of kindness can come back to help us in unexpected ways.