Romans 4:9-13
The purpose was to make him the father of all who believe without being circumcised, so that righteousness would be counted to them as well,
Beloved true born again readers,
As per above quote by Apotle Paul to the Gentile church, is it for them to 'believe' Abraham?
So the church no need to be circumcised like Abraham but can give 'tithes' as offering like Abraham to Melchizedek, and today's church to priests is fine?
Heresy!
Only 'believe' GOD, HIS Word and HIS Covenant given and made with HIS people individually or as per generation and at the same time periodically!
Abraham believe the Word of GOD during his time and in faith acted upon it, and that was counted as righteousness on his part then.
(Since Abraham was not suppose to receive the Law, hence sin did not come to life in him, for him to know sin and battle like Paul who received the Law. Moreover Abraham's sin was not recorded then, because by the Law and when sin is recorded, Abraham too is guilty of sin)
Because Abraham is like all of us, children from Adam and Eve, and when it comes to the Spiritual Law of GOD through Moses, we all have sinned and come short of the glory of GOD. (Romans3:23)
Then came the Israelites descended from Abraham (besides those who rebelled and were punished), believe the Word of GOD and received the Law of GOD through Moses in their time.
They 'obeyed' the Law (besides those violate) and acted in 'faith', even to the saying of the Prophets of the coming Messiah as their Old Covenant/Testament/Agreement.
(One among others Jesus spoke about is Nathanael, saying,
"Behold an Israelite indeed, in whom is no guile!")
Messiah Jesus the Lord from Heaven came and became flesh on earth, whereby a remnant of them believed. likewise acted in faith in their time.
And He discipled them the Kingdom of GOD and acted on it, even to the fulfillment of the Old, hence gave and made with them the New Covenant as promised.
Hence before He ascended, commissioned them He,to take the same to the ends of the earth, make disicples and baptized the scattered Jews and Gentiles in all nation.
Those who believe and acted by faith the same New Covenant in their time, became the 'body of Christ/church' and were furthermore instructed to observe all that Jesus have commanded.
And we Gentiles too did the same, believe and acted in faith to the Word of GOD in our time, which came through the discipled and commissioned Apostles and churches after them.
Finally, the verse quoted by 'markalan' above out of context, but in context and sound doctrine teaches us that, we're not to act Abraham's faith.
But rather to act in faith like Abraham to the Word of GOD and the Covenant HE gives and makes in our time of visitatiion, like father Abraham and the Israelites in thier time.
According to our time of believe and act of faith by the New Covenant and under grace, the Law have been 'abolished' since fulfilled by Messiah Jesus already.
That's why our believe and act of faith counted as righteousness by the given and made the New Covenant in our time, no longer abide by what's been 'abolished' nor of Abraham's that's been done with.
Shalom in the name of Lord Jesus Christ