…the church is sacramental, mystical, Christological, and pneumatological before it is sociological or juridical. The unity of the church is not psychological, political, or a federation of the like-minded, but a sacramental and spiritual unity in Christ first established in baptism and then expressed, nourished, and brought to maturity in eucharistic communion.
Susan K. Wood, “Continuity and Development in Roman Catholic Ecclesiology”, Ecclesiology, Vol. 7, No. 2 (May 2011), p. 152.