"Families face attacks from the devil because Jesus grows in parent's love and children's lives," he said.
But who, or what, is the devil?
A Literal Threat Far from being a metaphor of evil, Satan appears to be a real, supernatural hellish force in Pope Francis' almost obsessive remarks. Such a crude view has, however, changed several times through the centuries.
For example, in the Old Testament, Satan is not the devil seen in horror movies.
"He is a loyal servant of God, and a relatively minor figure," Darren Oldridge, a specialist in early modern religious history and the author of several books on the devil, told Discovery News.
"The devil is far more prominent in the New Testament, and here he is emphatically the enemy of God and goodness," he said.
Often depicted as a rapacious monster through the Middle Ages, the devil was increasingly viewed as an invisible spirit of temptation during the 16th-century Protestant Reformation initiated by Martin Luther and John Calvin.
"More recently, some liberal Christians have understood Satan in metaphorical terms. But he remains a real presence among evangelical Protestants and Catholic traditionalists," Oldridge said.