-Trinitarian baptism
-True Presence of Our Lord in the Blessed Sacrament
-Absolution for the penitent in the Sacrament of Confession
-Care for the sick in the Sacrament of Holy Unction, and through all the hospitals administered by the Catholic Church
-Uncompromising stance on the nuptial union that exists under the Sacrament of Marriage
-The graces of the Holy Spirit given in the Sacrament of Confirmation (as well with Baptism)
-Apostolic succession unbroken for 2,000 years and sacrificial ministry under the Sacrament of Holy Orders
Shall I go on?
I’d add one more: the Church is the pillar and ground of the truth.