The BIG ERROR of Protestants

Protestants often declare their faith in the "Infallible Word of God" and not in men. 

True, the Word of God is infallible and unchanging:

Recall Isaiah 40:8-
The grass withereth, the flower fadeth: but the word of our God shall stand for ever.

However, Protestants actually believe not in the unchanging Word of God but in their own interpretation of the Word of God!

How can we show this?  Easy!  They can change their mind about doctrines and teachings and they often do! 

So they can change their mind about what God's Word in the Bible means!!!

They might say, well they have changed their mind on things but it was because of spiritual growth and edification so it was positive.  But that proves their interpretation is NOT unchanging or infallible AND just begs another question: 

What is the Christian faith and who decides what doctrines belong to the faith?  Is it just personal so that there are as many Christian faiths as there are Christians or is there ONE Christian faith delivered to the saints and handed down?

Jude 3:

Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints.

The faith delivered to the saints cannot be changed.  Protestants clearly are rejecting this faith because their beliefs are subject to change while remaining "Protestant" so that cannot be the faith handed down and delivered to the saints.

So this is the BIG ERROR of Protestants: Their faith can change because it is based on their own interpretation.  The one true faith cannot change!  The teachings of the Catholic Church are unchanged since the apostles. 

For more to help your Protestant friends:

12 Early Church Quotes That Will Challenge Protestants

https://www.catholic365.com/article/2858/12-early-church-quotes-that-will-challenge-protestants.html