Yes. The Catholic Church is the only Church which teaches all the truths that Jesus Christ taught. Many other Christian communities have rejected the Sacraments of Penance and Anointing of the Sick, the Mass and the Real Presence of Jesus in the Eucharist, the spiritual supremacy of Peter and his successors, the popes, the efficacy of grace, and man’s ability to merit grace and Heaven. Some even question whether Jesus Christ is truly God. There is not a single truth that Jesus Christ revealed (whether personally or through His Apostles) which the Catholic Church does not still faithfully declare and teach.