But my friend, I'm afraid you are missing something. In Romans 3:30 Paul is using justification of coming through Christ Jesus, and not going directly to the Father, as did all before Damascus Road.
You are calling Jesus Christ a liar because he denied that any man could come directly to the Father without going through him EVEN BEFORE HE WENT TO THE CROSS much less BEFORE the Damascus road:
Jesus saith unto him, I AM the way, the truth, and the life: no man COMETH unto the Father, but by me. - Jn. 14:6
He didn't say "I WILL BE"! You are also calling Peter a liar because Peter denied that there was any other name given under heaven through which man can be saved BEFORE the road to demascus incident (Acts 4:12).
Your Romans 4:16-20 looks to be in error, for there is nothing in the Greek to substantiate your claim. You can find the foreknowledge of God here, but I see error to believe any man knew what God had hidden from man.
Paul uses the same preposition "ek" and "dia" in Romans 3:30 for both Jew and Gentile as Paul uses for Abraham in Romans 4
Rom. 3:29 Is he the God of the Jews only? is he not also of the Gentiles? Yes, of the Gentiles also:
30 Seeing it is one God, which shall justify the circumcision
by [ek] faith, and uncircumcision
through [dia] faith.
Rom 4:16 Therefore it is of [ek] faith, that it might be by grace; to the end the promise might be sure to
all the seed;
not to that only which is of the law, but to that also which is of
[ek] the faith of Abraham; who is the father of us all,
Gal. 3:7 Know ye therefore that they which are of [ek] faith, the same are the children of Abraham.
Abraham was a GENTILE and Paul says that justification is "EK" faith (Rm. 3:30; 4:16; Gal. 3:7) in regard to Abraham's faith, and ALL who are the children of Abraham. If you are not a child of Abraham "EK" faith you are not a child of God period!
Paul carefully uses "ek", and "dia" prepositions in order for us to understand what he is saying.
The preposition "ek" with faith is in contrast to "ek" with works and simply defines the basis for justification to be faith and not works. Ek speaks of origin or basis. Justifiation has it origin or basis IN FAITH not IN WORKS.
The preposition "dia" with faith simply defines the means THROUGH WHICH the OBJECT of faith is embraced. This is proven to be the means THROUGH WHICH Old Testament saints embraced Christ in the gospel is proven in Romans 3:25:
Romans 3: 25 Whom God hath set forth to be a propitiation through [dia] faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
Paul is referring to the sins of Old Testament saints that embraced the gospel "THROUGH" faith even before Christ came.
Did God in times past interact directly with man? We know He did. Does God The Father today directly interact with man? We know He doesn't for it is by His WORD. It is necessary today that we come throughJesus Christ
Jesus Christ condemns your thinking here because BEFORE the cross he said that no man cometh to the Father BUT BY ME. Take a look at the Greek preposition he uses when he says this:
Jn. 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but
by [dia] me.
The oldest book in the bible, the book of Job contradicts your conclusion as well as Job claims to have a REDEEMER that intercedes and stands between him and God (Job. 19).
No sinner from Genesis to Revelation can come DIRECTLY to God or has ever done so! You simply do not know what you are talking about.