Custodi di quella Fede §12

¹² In a matter of such importance and where the seduction is so easy in these times, it is urgent that the Christian watch himself from the beginning. He should fear the least danger, avoid every occasion, and take the greatest precautions. Use all the prudence of the serpent, while keeping in your heart the simplicity of the dove, according to the evangelical counsel. Fathers and mothers should be wary of inviting strangers into their homes or admitting them to domestic intimacy, at least insofar as their faith is not sufficiently known. They should try to first ascertain that an astute recruiter of the sect does not hide himself in the guise of a friend, teacher, doctor or other benefactor. Oh, in how many families has the wolf penetrated in sheep's clothing!