The primary definition of salvation is to be freed from all that oppresses us, especially from sin and the devil.
Jesus said:
“He has sent me to proclaim liberty to captives and recovery of sight to the blind, to let the oppressed go free,”** Luke 4:14, 17-21). **
Before salvation we are captives to sin, blinded by sin, oppressed by sin. Jesus came to save us from all this.
Jesus answered them, “Most assuredly, I say to you, whoever commits sin is a slave of sin"
John 8:34.
“So if the Son makes you free, you will be free indeed.”
John 8:36
That is why those who loved God were waiting for a savior. They wanted to be freed from the slavery to sin.
This salvation extends to the next life where we will be in union with God in heaven.
We are saved by grace. If our faith alone saves us, then Jesus died for nothing.
Jesus earned the grace to save us by his death and resurrection, suffered out of love for His Father and for us.
We receive this grace that saves us first through faith, then through faith and obedience.
Faith means to believe what God has revealed, because He is God and cannot lie.
Jesus told his apostles to preach the Gospel and he who believes and is baptized will be saved (mark 16:16). The apostles learned the Gospel entirely and directly from Jesus and the Holy Spirit who Jesus sent. They did NOT learn the Gospel by guesswork on scripture verses, as in Protestantism.
Thus, we have to believe the Gospel His Church teaches to be saved.
The teachings that apostles learned from Jesus and handed down is that those who believe Jesus and convert receive the grace of salvation, or sanctifying grace, or justifying grace when they are baptized.
This grace frees us from the inclination to sin to some extent, makes us children of God, thus gives us the right to heaven, turns our hearts toward God and removes all sins, original and all our personal sins. Since these sins oppress us, then this grace takes away these sins and also removes some of the inclination to sin, (concupisence) thus SAVES US FROM OUR SINS.
Remember, the angel said to Joseph, “you shall name him Jesus, for he shall save his people from their sins” Matthew 1:21
Thus, when St. Paul says, “for by grace have you been saved through faith, and not by works” he means by grace received at baptism, through faith in the Gospel, because of faith in Jesus, we received the grace that frees us from the inclination to sin and removes all our other sins. Thus we have been saved. “Not by works” actually refers to the ceremonial practices of the Jewish religion, such as circumcision, sabbath observance, etc. But, of course, it can also be extented to mean “not by anything we have done” meaning not by obeying the commandments, etc. because at baptism this grace we receive is a free gift and it is not owed to us.
Now, we receive most of this grace that saves us from the sacraments, first baptism, as I mentioned, but especially the Eucharist. The Church teaches the Eucharist is like a fountain of grace, the other sacraments like rivulets of grace.
Since baptism does not remove all the inclination to sin, we constantly need God’s grace to free us from this inclination to sin and to turn our hearts toward him and away from the things of this world. At mass, we are made present with the sacrifice of Jesus, in which he earned the grace of salvation. Thus, through the eucharistic sacrifice the grace Jesus earned on the cross is made available to us to continually free us from our sins. Thus the Church teaches that the work of salvation (freeing us from our sins, and everything else that oppresses us) is carried on by Jesus at mass. The primary purpose of mass is to give us the grace to continually save us, to free us from our sins, so we can be united with Jesus here and in the next life. So we do go to mass to get something. We go to mass to receive more of the grace of salvation.