This question concerns in part the following quote heard regularly by Presbyterian Pastors:
“Catholics deny the sufficiency of Christ’s redemptive work on the cross and by doing so, forfeit their salvation.”
The Idea is explained in the following terms:
Christ's sacrifice was perfect, and nothing we can do, not works, not anything, can save us. (Which a Catholic believes) but Catholics have to “DO” things, (as explained by many Pastors): doing Christ in the Eucharist, doing other Sacraments, doing works of Mercy, doing intercessory prayer, doing the Mass each and every week, fasting, alms giving and Prayer.
The idea that Catholics “DO” these graces instituted by Christ rather than “Receiving” them, seems to dominate the thinking of many Presbyterian brethren.
According to Presbyterians, what would be more perfect, and on what Biblical basis do they justify their choice?
(Presbyterian Position)That Christ's Good works cover the sins of men with his sacrifice to the father, So that he no longer sees the the sinful nature of the Person, but rather sees the righteousness of the Son, and we are sanctified by that covering (No Actual Change to the Believer Is necessary after acceptance through faith), or,
That Christ actually does more than cover up our sins by the meritorious actions of the Son, but provides for us a Church with Sacraments, Graces for us to help work out our salvation in fear and trembling, to actually increase our sanctity in a fallen world, to avoid the temptations of the flesh and not just to cover up our sinful nature, but to actually change and become sanctified by his Grace (Actual Change to the Believer is necessary after baptism).