It is through the Church that the world knows Jesus and thus has salvation.
It began with the Apostles and disciples and has spread throughout the world to all nations, just as Jesus said and commanded.
Jesus through the Holy Spirit guides and protects the Church and the Church guides, protects and proclaims the truth.
Those who believe in Jesus and have been baptized in the name of the Father, the Son and the Holy Spirit are members of the Church, even if imperfectly.
We remain in Jesus, even if imperfectly, when we continue in our faith, made perfect through our works, confessing our sins and asking for forgiveness.
We must not become comfortable in our sins thinking that we no longer need obey God since Jesus has paid the debt for our sins. We must not take Jesus’ love for ourselves without also giving that love to others.
Putting the RCC or even just the CC in place of the true church that Christ calls His “bride” is an error.