Pope St. John Paul II Celebrates Mass Ad Orientem during his June 1999 visit to Poland:

Photo courtesy this amazing blog.
Jesus said to them: “I have come into this world so that a sentence may fall upon it, that those who are blind should see, and those who see should become blind. If you were blind, you would not be guilty. It is because you protest, ‘We can see clearly,’ that you cannot be rid of your guilt.”