97 Our invitation goes out specially to those lay people who seek God with greater earnestness and intensity, and strive after Christian perfection while living in the midst of their fellow men. By their devoted and warm friendship they can be of great assistance to the Church's ministers since it is the laity, occupied with temporal affairs while at the same time aiming at a more generous and perfect conformity to their baptismal vocation, who are in a position, in many cases, to enlighten and encourage the priest. The integrity of his vocation, one that plunges him into the mystery of Christ and the Church, can suffer harm from various circumstances and from contamination by a destructive worldliness. In this way the whole People of God will honor Christ our Lord in those who represent Him and of whom He has said: "He who receives you receives me, and he who receives me receives him who sent me," (148) promising an assured reward to anyone who in any way shows charity toward those whom He has sent. (149)
Source: Sacerdotalis Caelibatus (Vatican.va)