Thus, it is not unusual to meet people who think that "not to believe in any," or "not to adhere firmly to any assertion as unshakably true in itself," is a primary condition required of democratic citizens in order to be tolerant of one another and to live in peace with one another. May I say that these people are in fact the most intolerant people, for if perchance they were to believe in something as unshakably true, they would feel compelled, by the same stroke, to impose by force and coercion their own belief on their co-citizens. The only remedy they have found to get rid of their abiding tendency to fanaticism is to cut themselves off from truth.

-Jacques Maritain, Truth and Human Fellowship

[H/T St. Thomas Aquinas Facebook page]