This article utilizes the analytical concept of acedia as the fundamental theoretical framework and applies a systematic literature review of peer-reviewed materials and documents on spiritual sloth, spiritual dryness, Catholic clerical celibacy, social bonding and communal spirituality. This article explores how the Catholic parish clergy’s mandatory celibacy intensifies loneliness and facilitates the spiritual sloth of parish clergy or what is theologically known as acedia. Unlike religious priests who live in religious communities, parish clerics fundamentally live, work, and pray alone in the parish, without strong communal support from fellow priests, bishops, and lay parishioners; thus, making them prone to loneliness, a main component of acedia. This article argues that mandatory celibacy further deprives parish clerics of the social and spiritual support necessary to enhance diocesan clerical spirituality and strengthen spiritual resistance against acedia. It recommends a structural adjustment in the social and spiritual life of parish priests, creating small communities of priests situated in similar territory or districts to allow them to live and work as a team with strong social and spiritual support in the spirit of “living baptismally” to overcome priestly acedia.