Cathedral de Segovia, Spain
Religion of true Christians is important. We are saved by Christ through the Christian religion.
The Church is important in the salvific plan of God. The Church implements the teachings of Christ in the form of doctrines and practices in the worship and service of God in order that men will be incorporated and are to be transformed in Christ or to be Christian from baptism. In other words, the Church founded by Christ (Matthew 16:16-18) was commanded by Himself to baptize and teach all nations (Matthew 28:19-20) so that this Christian religion or Christianity will spread throughout the world. The Church and Christianity are inseparable. The Church is the mystical Body of Christ is the instrument of Christ for salvation.
Our blessed Lord alone saves but He wills it to establish the Church to minister the Christian religion. A fisherman can catch fish with his bare hands but he prefers to catch fish by a fishing rod. Christ is the fisherman and the Church ministering the Christian religion is the fishing rod. You can not tell a fisherman not to use a fishing rod just as you can not tell Christ not to use His Church. He would have not established it anyway in the first place if that is the case.
Jesus alone saves but saves through the Church. He chose men to be fishers of men not just fishing rods. Heed the words of Christ, And he said to them, “Follow me, and I will make you fishers of men.” Matthew 4:19
So the next time you say Christian religion is not important, think again. For if you reject those fishers of men Christ instituted, you reject Christ. “He who hears you hears me, and he who rejects you rejects me, and he who rejects me rejects him who sent me.” Luke 10:16