Q. 1 I heard that if a Catholic never goes to confession, he can be eternally lost. Is that true?
A. 1 Yes!
Q. 2 Why is that?
A. 2 The Catholic Church affirms that for believers, the sacraments of the New Covenant, not only the Sacrament of Confession, but also the Sacraments of Baptism, Confirmation and the Holy Eucharist are necessary for salvation. This teaching is quoted in the Catechism of the Catholic Church as follows:
"The Church affirms that for believers the sacraments of the New Covenant are necessary for salvation. [Cf. Council of Trent (1547): DS 1604] 'Sacramental grace' is the grace of the Holy Spirit, given by Christ and proper to each sacrament. The Spirit heals and transforms those who receive him by conforming them to the Son of God. The fruit of the sacramental life is that the Spirit of adoption makes the faithful partakers in the divine nature [Cf. 2 Pet 1:4] by uniting them in a living union with the only Son, the Savior." [See also C.C.C. ## 1257, 2003, 460] (C.C.C. # 1129)
Q. 3Are you saying that the Sacrament of Baptism is absolutely necessary for salvation?
A. 3 Yes. This is affirmed in the Catechism of the Catholic Church as follows:
"The Lord himself affirms that Baptism is necessary for salvation. [Cf. Jn 3:5] He also commands his disciples to proclaim the Gospel to all nations and to baptize them. [Cf. Mt 28:19-20; cf. Council of Trent (1547) DS 1618; LG 14; AG 5] Baptism is necessary for salvation for those to whom the Gospel has been proclaimed and who have had the possibility of asking for this sacrament.
[Cf. Mk 16:16] The Church does not know of any means other than Baptism that assures entry into eternal beatitude; this is why she takes care not to neglect the mission she has received from the Lord to see that all who can be baptized are "reborn of water and the Spirit." ...(C.C.C. # 1257)