From the Catechism of the Catholic Church
“Outside the Church there is no salvation”
846 How are we to understand this affirmation, often repeated by the Church Fathers?335 Re-formulated positively, it means that all salvation comes from Christ the Head through the Church which is his Body:
Basing itself on Scripture and Tradition, the Council teaches that the Church, a pilgrim now on earth, is necessary for salvation: the one Christ is the mediator and the way of salvation; he is present to us in his body which is the Church. He himself explicitly asserted the necessity of faith and Baptism, and thereby affirmed at the same time the necessity of the Church which men enter through Baptism as through a door. Hence they could not be saved who, knowing that the Catholic Church was founded as necessary by God through Christ, would refuse either to enter it or to remain in it.336
847 This affirmation is not aimed at those who, through no fault of their own, do not know Christ and his Church:
Those who, through no fault of their own, do not know the Gospel of Christ or his Church, but who nevertheless seek God with a sincere heart, and, moved by grace, try in their actions to do his will as they know it through the dictates of their conscience - those too may achieve eternal salvation.337
Notice the last line.
You can’t just take those lines out of context. People never want to quote the rest of the paragraph. That part of the catechism comes from Lumen Gentium and there is more following what you quoted:
"But often men, deceived by the Evil One, have become vain in their reasonings and have exchanged the truth of God for a lie, serving the creature rather than the Creator.(129) Or some there are who, living and dying in this world without God, are exposed to final despair. Wherefore to promote the glory of God and procure the salvation of all of these, and mindful of the command of the Lord, “Preach the Gospel to every creature”,(130) the Church fosters the missions with care and attention."
And:
"As the Son was sent by the Father,(131) so He too sent the Apostles, saying: “Go, therefore, make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things whatsoever I have commanded you. And behold I am with you all days even to the consummation of the world”.(132) The Church has received this solemn mandate of Christ to proclaim the saving truth from the apostles and must carry it out to the very ends of the earth.(133) Wherefore she makes the words of the Apostle her own: “Woe to me, if I do not preach the Gospel”,(
Men follow lies out of their own vanity. It is very scarey when we see so many of our loved ones today leaving the Catholic church for another church or we have close friends who are of a different denomination. We want so hard to believe it is okay, “at least they are Christians” we tell ourselves. We want so hard to believe they will go to heaven or to believe that someone who has died outside the Catholic church is in heaven.
It’s scarey. That is why so many people get upset when they hear there is no salvation outside the Catholic church but it is what the church has taught and continues to teach.
And following your quote the catechism quotes this 851:
"Those who obey the prompting of the Spirit of truth are already on the way of salvation. But the Church, to whom this truth has been entrusted, must go out to meet their desire, so as to bring them the truth. Because she believes in God’s universal plan of salvation, the Church must be missionary".
Just like the prodigal son, they are searching and headed home but we must go out and meet them, just as the prodigal sons father did. We truly need to be bringing people into the Church. That is tough love and it is hard because people many times don’t want to hear it. Don’t settle. Pray. It works. It brought me home. I am so grateful for the people who refused to believe I was okay as long as I went to church, even a protestant church.