“The faith passes, so to speak, through a distiller and becomes ideology,” he said, according to Radio Vatican. “And ideology does not beckon [people]. In ideologies there is not Jesus: in his tenderness, his love, his meekness. And ideologies are rigid, always. Of every sign: rigid.
“And when a Christian becomes a disciple of the ideology, he has lost the faith: he is no longer a disciple of Jesus, he is a disciple of this attitude of thought… For this reason Jesus said to them: ‘You have taken away the key of knowledge.’ The knowledge of Jesus is transformed into an ideological and also moralistic knowledge, because these close the door with many requirements.”
“The faith becomes ideology and ideology frightens, ideology chases away the people, distances, distances the people and distances of the Church of the people,” Francis added. “But it is a serious illness, this of ideological Christians. It is an illness, but it is not new, eh?”
To be a disciple of a rigid ideology is to be infected with a “serious illness” which frightens other people.