Pope Francis strongly condemned clerical sex abuse in his annual Christmas speech to the Roman Curia Friday, promising that the Church leadership will never again cover-up abuse or treat such cases lightly.

“Let it be clear that before these abominations the Church will spare no effort to do all that is necessary to bring to justice whosoever has committed such crimes. The Church will never seek to hush up or not take seriously any case,” Pope Francis said in Vatican’s City’s Apostolic Palace on December 21.