in 1824 pope leo xii issued "ubi primum" discussing a number of concerns, from bishops residing in their dioceses to the popularity of indifferentism, which he also associated with deism. "the current indifferentism has developed to the point of arguing that everyone is on the right road. this includes not only all those sects which though outside the catholic church verbally accept revelation as a foundation, but those groups too which spurn the idea of divine revelation and profess a pure deism or even a pure naturalism... but a tolerance which extends to deism and naturalism, which even the ancient heretics rejected, can never be approved by anyone who uses his reason.