37 In the same way the Church cannot approve of that liberty which begets a contempt of the most sacred laws of God, and casts off the obedience due to lawful authority, for this is not liberty so much as license, and is most correctly styled by St. Augustine the "liberty of self ruin," and by the Apostle St. Peter the "cloak of malice."(23) Indeed, since it is opposed to reason, it is a true slavery, "for whosoever committeth sin is the slave of sin."(24) On the other hand, that liberty is truly genuine, and to be sought after, which in regard to the individual does not allow men to be the slaves of error and of passion, the worst of all masters; which, too, in public administration guides the citizens in wisdom and provides for them increased means of well-being; and which, further, protects the State from foreign interference.
Source: Immortale Dei (Vatican.va)