Not sure . I recall folks that I talk to by their avatar so if it has recently changed I may have not remembered a conversation with ya on this . Also I tend to ask questions in relation to how I understand a persons recent post . Hope that helps .
Yes I understand that . Note the context is in sin and having no excuse.
Some folks would understand it as general revelation.
Yes God continued to reveal Himself before before the Hebrews
Good places in Scripture to see this is Genesis especially around the flood account .
How we ( Reformed folks) understand this is the OT saints had faith in God placing their confidence in God in providing a Savior that would come Jesus Christ. Note Job puts his faith in God for a Savior
Job 19:25 “As for me, I know that my Redeemer lives,
And at the last He will take His stand on the earth.
26”Even after my skin is destroyed,
Yet from my flesh I shall see God;
No the OT existed and was set hundreds of years before the coming of Jesus Christ in the flesh .
As for the NT you don’t have to go beyond the NT itself to get the idea that it was being set .
2nd Peter 3:15 and regard the patience of our Lord
as salvation; just as also our beloved brother Paul, according to the wisdom given him, wrote to you,16 as also in all
his letters, speaking in them of these things, in which are some things hard to understand, which the untaught and unstable distort, as
they do also the rest of the Scriptures, to their own destruction
That and according to writers in the early church show us the NT set well before 400 AD
“As for me, I know that my Redeemer lives,
And at the last He will take His stand on the earth.
26“Even after my skin is destroyed,
Yet from my flesh I shall see God;
Looking above where I gave the example of Job I believe that covers this . In short the OT saints placed their confidence in God providing a savior.
Still I have the question concerning salvation about to day how is one saved without hearing the Gospel?
Blessings
Bill