12 In face of the passions that at this moment are troubling the minds of so many in Spain, We exhort, nay, We conjure, all Spaniards to recall this so important duty and to fulfil it with all zeal. Let those, especially, who are of the clergy, and whose words and example exercise such potent influence, scrupulously apply themselves to observe moderation and obedience. For be it known to them that their toil in the fulfilment of their duties will be most profitable to themselves and efficacious to their neighbour, when they follow in full submission the guidance of him who is placed over them as head of the diocese. Assuredly it is not conduct consonant with the duties of the priesthood to give oneself up so entirely to the rivalries of parties as to appear more busy with the things of men than with those of God.
Source: Cum Multa (Vatican.va)