Roman Catholic dogma states that the mass is necessary for salvation. The Bible says that salvation is a finished work wrought by Jesus Christ on the cross, and that all the merit's of the salvation Christ earned on the cross are available to the true believer by faith (John 6:29; Heb. 11). Furthermore, the Bible explicitly states that, "He [Jesus Christ], HAVING OFFERED ONE SACRIFICE FOR SINS FOR ALL TIME, sat down at the right hand of God...". (Heb. 10:12).
How about baptism? (read more)
In reference to His redemptive work, Jesus Himself said on the cross, "It is Finished" (John 19:30). What is finished is finished, what is done is done. The Roman Catholics say redemption is not finished, it is not done, and that they must re-create and partake in the mass in order to apply the work of Christ's redemption
... various innovations and heresies were gradually introduced regarding baptism: that one must be baptized to be saved-- indeed, that baptism itself saves the soul even when administered to infants. These heresies became known as the doctrine of baptismal regeneration. Most Protestants holding these beliefs today are not aware that they originated with the Roman Catholic Church in the Middle Ages.
The Council of Trent (1545-63) stated that while Christ "merited for us justification by His most holy passion ... the instrumental cause [of justification/regeneration] is the sacrament of baptism .... If anyone says that baptism is ... not necessary for salvation, let him be anathema."
(1) Vatican ll (1962-65) reconfirms all of Trent (2) and reiterates the necessity of baptism for salvation,(3) as does the universal Catechism of the Catholic Church released by the Vatican in 1993. "Baptism is necessary for salvation ... the Church does not know of any [other] means ... that assures entry into eternal beatitude .... "