It occurred to me today, I think, the real reason why Reformed and evangelical Protestants reject the Sacraments and any belief in the idea of sacramentality.
St. Paul writes (Ephesians 2:8-10):
For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast. For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them.
In the Protestant mind, Baptism and the other Sacraments are “works.” The idea of sacramentality is incompatible with the doctrine of sola fide because, by the Protestant interpretation of Paul, one’s salvation is accomplished by faith alone. To grant that the act of Baptism itself, a “work,” has any sacramental power at all, that it washes away one’s sins and gives one a new birth in Christ, is to admit that some other action beyond faith alone is necessary for salvation.
Therefore, in order to make sola fide work, they dismiss Paul’s clear testimony elsewhere in Scripture regarding the efficacy, sacramentality, and necessity of Baptism (Titus 3:4-7):
But when the goodness and loving kindness of God our Savior appeared, he saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit, whom he poured out on us richly through Jesus Christ our Savior, so that being justified by his grace we might become heirs according to the hope of eternal life.
How can this be? How can Paul say that God saved us not because of works, and at the same time that He saved us by the washing of regeneration (διὰ λουτροῦ παλιγγενεσίας)? Clearly, Paul speaks of “works” here in a different way than Protestants suppose.
We are saved not because of works done by us in righteousness, but according to his own mercy. Certainly, we are saved only by God’s mercy and grace — no works we do can ever earn our salvation. But that doesn’t mean — and Paul never says — that we are saved by faith alone — that we don’t have to do anything. Baptism, and the other Sacraments, are not “works” by which we try to earn God’s favor or earn our salvation, but the God-given and Christ-instituted means by which we receive His grace.