One cannot sufficiently recommend to priests a life lived in common and directed entirely toward their sacred ministry; the practice of having frequent meetings with a fraternal exchange of ideas, counsel and experience with their brother priests; the movement to form associations which encourage priestly holiness.
Priests should reflect on the advice of the Council, which reminds them of their common sharing in the priesthood so that they may feel a lively responsibility for fellow priests troubled by difficulties which gravely endanger the divine gift they have. They should have a burning charity for those who have greater need of love, understanding and prayer, who have need of prudent but effective help, and who have a claim on their unbounded charity as those who are, and should be, their truest friends.
Pope Paul VI
Sacerdotalis caelibatus 80-81