26 And it is a part of this theory that all questions that concern religion are to be referred to private judgment; that every one is to be free to follow whatever religion he prefers, or none at all if he disapprove of all. From this the following consequences logically flow: that the judgment of each one's conscience is independent of all law; that the most unrestrained opinions may be openly expressed as to the practice or omission of divine worship; and that every one has unbounded license to think whatever he chooses and to publish abroad whatever he thinks.
Source: Immortale Dei (Vatican.va)