“Why don’t you provide some basis”
We did.
You ignored it.
Your vanity in your religion blinds you.
Why don’t you provide some basis that your protestant beliefs are based on the Bible as you claim? It is obvious that you avoid answering because they are not based on Scripture but on man’s personal opinion.You don't have anything in response as the various multitudes of myriad beliefs from Oneness Pentecostals to Seventh Day Adventists, Unitarians, etc. don't have any - as they aren't from God
The Catholic Church can substantiate that the Catholic faith is based on the teachings of Jesus Christ, Sacred Scripture and the Magisterium. The Catholic Church has the authority and the keys to the Kingdom of Heaven to bind and loose from Jesus Christ. Yes, the Catholic Church were the original Christians and many left when they believed in heresies, even including the protestants 1500 years later. They are always welcome back before they die if they fully accept God’s Truths.
And Adsum is vain in His trust in God. Jesus said that He would leave a community, a Church.
That’s what Adsum is vain in - in Jesus who is Lord, God and Savior.