An essential characteristic of Catholic belief is the certainty that it is indeed "Catholic," i.e. "universal:" for every man in every place, time and circumstance.
In other words, it is true: the Truth. The Catholic faith alone fully presents Christ to the world: the Way, the Truth and the Life.
If it did not always apply it would not really be true, and therefore, would not be Catholic!
Compare this claim with the claim of Christ Himself: "I am the Way and the Truth and the Life, noone comes to the Father but through me." John 14:6
The Church is simply passing on that same absolute certainty in the Absolute.
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