Catechism of the Catholic Church §575 — excerpt
Many of Jesus' deeds and words constituted a "sign of contradiction", but more so for the religious authorities in Jerusalem, whom the Gospel according to John often calls simply "the Jews", than for the ordinary People of God.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.