23 Some strive to tear out and entirely eradicate the Christian faith from the souls of others, especially of those who are unlettered and simple folk, poor people whose faith is their one solace in this mortal life. They promise them a wonderful happiness which we will never be able to fully attain in this earthly exile. For no matter where man looks, no matter how he strives, if he wanders far from God, he will not enjoy nature's tranquillity, which he seeks, nor harmony and peace of soul; he will be restless and harassed, as though tossed by fever.
Source: Invicti Athletae (Vatican.va)