I had not intended to say anything else concerning this issue. However, I just received his reply and to be quite frank, I am not completely sure I understand what he is saying in order to respond to him properly.
I hope you don't mind if I post that response here.

Quote
first of all... drop down to 8:13... where it here clearly states that the "new" covenant "obsoletes" the old... the old covenant which was thrown out... discarded... after Israel dishonoured the covenant with God... faithlessly ...

very important...
but then yes... 10-12 are important...

old covenant PROMISED a savior was coming... one who would fulfill the promises...and that on that day and after that day... the 'old ways' would be obsolete... having served the intended purpose... and the new version of the now fulfilled covenant would come into effect...thus the 'new covenant'...

10 This is the covenant I will establish with the people of Israel
after that time, declares the Lord.
I will put my laws in their minds
and write them on their hearts.
I will be their God,
and they will be my people.
11 No longer will they teach their neighbor,
or say to one another, ‘Know the Lord,’
because they will all know me,
from the least of them to the greatest.
12 For I will forgive their wickedness
and will remember their sins no more.”[c]

so ... Jesus fulfills the covenant promises... even after Israel faithlessly betrays the terms of that covenant... betrayal of a covenant being punishable by death... literally... you have forfeited your life by betraying the covenant...

so for God to 'forgive their wickedness, and remember their sins no more..." and not just of 'chosen and fallen' Israel... but of all peoples... all God's children...

and Israel will no longer need to go and spread the message, the Gospel message, that God exists... that he is god... for He put His laws in our hearts and minds... all of us... each of us...

simple takeaway from this passage ...

God... has written the knowledge of his existence, and of his laws deeply within each of us... we each have the GOSPEL message.... the evangelistic mission... imprinted undeniably and irrevocably within our hearts and minds.... and noone ever again NEEDS to be told that God exists, not simply to 'learn that truth' for we ALREADY know....

evangelism then serves a purpose ... but is no longer commanded of us in order to teach THAT GOD EXISTS.... evangelism then must mean something else... at its core... and must serve some other purpose...

and ... again simple... if every man woman and child 'knows' deep within their core that God exists.... you definitely do not require a bible to learn that, or to choose to believe it....
choose to surrender' to that....

so Hebrews 8 is a good example of how I would describe my faith...

I believe absolutely... I am absolutely convicted, ... that God exists... and I believe Hebrews 8 :10-12... that God himself has authored a message written deep within my 'soul' knowledge of God, and of God's laws...

Anything I believe EVER in any scripture... I believe because of God, the Word of God, and Jesus, and the Holy Spirit...

I never believe in God because of the bible... it is that if I believe in the bible, it is because of my faith in God . Every time. it all comes back to Faith Like Daniel