Blackboard Outside The Front

A priest who was walking through a small town saw a blackboard outside the front door of a school. It had been washed and put out to dry in the open air. There was a piece of chalk at the foot of the blackboard. The priest took the chalk and wrote in large letters,

"I'm a priest and I pray for you all."

A lawyer happened to pass next and when he saw what the priest had written, he added under it, "I'm a lawyer and I defend you all."

Then, a doctor came by, took the piece of chalk, and wrote on the blackboard, "I'm a doctor and I cure you all."

Finally, an ordinary citizen stopped, looked at what the others had written, thought for a few seconds and then added, "I am an ordinary citizen and I pay for you all."