Two nuns driving out in the boonies when they ran out of gas. Fortunately, there was a gas station not far away, where they ask to buy a can of gas.

‘I’m sorry,’ said the attendant, ‘all I have for you to carry is an old chamber pot.’ The nuns agreed that this would ok.

They returned to the car and ask they were pouring the gas into the tank, a man drove by, stopped, and said, ‘Oh sisters, if I only had your faith.’