The skeptics will point to the obstacles Francis faces in accomplishing much of anything beyond making casual believers feel better about the softer tone coming out of Rome while feeling free to ignore the harder substance. The Catholic Church is one of the oldest, largest and richest institutions on earth, with a following 1.2 billion strong, and change does not come naturally. At its best it inspires and instructs, helps and heals and calls the faithful to heed their better angels. But it has been weakened worldwide by scandal, corruption, a shortage of priests and a challenge, especially across the fertile mission fields of the southern hemisphere, from evangelical and Pentecostal rivals. In some quarters, core teachings on divorce and contraception are widely ignored and orthodoxy derided as obsolete. Vatican bureaucrats and clergy stand accused of infighting, graft, blackmail and an obsession with “small-minded rules,” as Francis puts it, rather than the vast possibilities of grace.