Is the assumption of Mary Scriptural? Some n-C I came across said unless I gave a biblical quote he isn’t changing his mind that I have been misled by my Church. He says ONLY the Bible can lead you to ALL TRUTH. Any experts out there? Need help!
Where did he get the statement “Only the Bible can lead you to all truth?” Tell him to back that statement up with the Bible. When he plainly can’t, you can show him what the Bible says about “The pillar and bulwark of truth.” Show him 1 Timothy 3:15.
You don’t need to defend the Glorious Assumption. You need to instead, go on the offensive and attack his faulty doctrine of “Sola-Scriptura.”
Any Scriptural attempt to directly support the Glorious Assumption is grasping at straws, and dishonest. When trying to convince a Protestant of the Catholic Church, the Marian doctrines, particularly the Glorious Assumption should be one of the absolute LAST points that you want to argue, because in all probablility, it will ONLY be believed by someone who has first accepted the authority of the Catholic Church. That doctrine is more of a stumbling block into people accepting the Catholic Church, than a selling point.
When people speak the language of “Sola-Scriptura,” a doctrine that their church has mislead them to believe, the best way to convince them of Catholic Truth, is to first stick a nail in the coffin of Sola-Scriptura. You can do so, sticking to Scripture, and with any knowledge of Church history. Then, once they are willing to accept sources outside of Scripture, show them what the Early Church Fathers believed.
What concerns me is the phraseology of your initial question. It appears that your Protestant friend is trying to get you to speak and think in Protestant terms. Asking, “Is this Scriptural?” or “Is this Biblical?” has a connotation of the Bible being the pillar and bulwark of truth. Again, as I mentioned 1 Timothy 3:15.
Your friend will try to claim that the “church” referred there is the “invisible church,” but Jesus said that the gates of Hell will not prevail over His Church, while a kingdom split into factions can not stand. Therefore, the whole notion that the “invisible church” is the Church that Jesus founded is flat out contradicted by Scripture. Historically, you can show that it was, is, and ever shall be the Catholic Church.
I hope that helps.