Freedom is properly so called to the extent that it implements the truth regarding the good. Only then does it become a good in itself. If freedom ceases to be linked with truth and begins to make truth dependent on freedom, it sets premises for dangerous moral consequences, which can assume incalculable dimensions. When this happens, the abuse of freedom provokes a reaction, which takes the form of one totalitarian system or another. This is another form of the corruption of freedom, the consequences of which we have experienced in the twentieth century, and beyond.
--Pope John Paul II, Memory and Identity, 2005