Article 1, Section 4: "No person who acknowledges the being of a God and a future state of rewards and punishments shall, on account of his religious sentiments, be disqualified to hold any office or place of trust or profit under this Commonwealth."
This law, given above as being on the books in Pennsylvania, is misunderstood by the author of the w/u. The law actually states that no person shall be disqualified from office because of his religious beliefs. It does not actually say that atheists cannot hold office. What it says is that a particular religion should not be the determining factor of office--that is, it doesn't matter what religion you belong to. Pennsylvania was originally conceived as a haven of relative religious freedom.