I received dogma, but no proof.
It was generally agreed that the believers were already saved before the Day of Pentecost, and that believers are those who constitute the Body of Christ.
Given the aforementioned, no one explained how the believers constituted the body of Christ), yet the church (the body of Christ) wasn’t born until the Day of Pentecost.
They parsed words and issued dogmatic statements yet did not explain how it was yet wasn’t yet was on the Day of Pentecost. Like it was nebulous yet in a state of pre-existence - like it was semi-solid.
One, look at the transfiguration.
Two, Jesus, after his death and subsequent resurrection, broke the gates of hell, releasing those held therein. The patriarchs were not saved until after Christ’s death and resurrection.
The biblical quote for this is Ephesians 4:9.
“Now that he ascended, what is it but that he also descended first into the “lower parts of the earth?”, ie Hades and Sheol.
It might clear things up if you consider that the 'Church' formed means the organized Catholic Church, under the guidance of the Holy Spirit, as the body of Christ. The 'saved' is the fate of individuals. The proof is the existence of a 2000+ year old Church.