84 And now, finally, to you, dear Children. Priests of the Most High, both secular and regular, the world over, We address Our words. You are "Our glory and joy," you, who with such generosity bear the "burden of the day and the heats," you, who so powerfully help Us and Our Brethren of the Episcopate in fulfilling the duty of feeding the flock of Christ. To you We send Our Paternal thanks and Our warmest encouragement. We know and fully appreciate your admirable zeal; and to it, in the needs of the present, We make this heartfelt appeal. These needs are becoming daily graver. All the more must your redeeming work grow and intensify; for "you are the salt of the earth, and the light of the world."
Source: Ad Catholici Sacerdotii (Vatican.va)