By checking their consistency with the deposit of faith originally given the Apostles and its subset actually recorded in the Holy Scripture.
Please show me where the Apostles were given a deposit of faith and it's subset actually recorded in Holy Scripture that you can judge these non inspired individuals to be consistent with.
This got answered much as I would have expected while I was away. Catholics claim their belief system is based on what Jesus taught the Apostles. If that were true they would only use the gospels and the writings of the Apostles. Everything needed for our salvation is there. If they wanted to know how the first church operated all you have to do is read the of Acts of the Apostles. They would see that Jesus did as He promised and did not leave them alone. He sent the Holy Spirit to guide them along with angles and Himself in the case of Paul.
The Catholics freely admit they believe a better way to determine how a church should operate is to look at the church a 100 years or more after the fact. They use the uninspired writings of people of those times. It is no wonder they get upset when Christians want scripture alone.
Why would you want to?
Because we believe in Jesus Christ God and our Savior.
my sins, past, present and future have already been forgiven by my Father in heaven after I acknowledged I was a sinner, asked forgiveness and accepted His Son’s finished work on the cross for me.
This is a half-true, and the infection of faith that you got from Protestantism. Christ did redeem all sin and with baptism you received the gift of redemption. You however, continue to be on the road to salvation and future sin may lead you away from it. Consider 1 Timothy 1:19 and especially
brethren, labour the more, that by good works you may make sure your calling and election. For doing these things, you shall not sin at any time. (2 Peter 1:10; check also the context)
Make sure your calling and election.
The blood of Jesus on the mercy seat washed away all my sins and allowed me to be redeemed. The baptism Jesus provides for all believers is of the Holy Spirit. It allows us to be born again from our water birth with Satan as our legal father caused by Adam's disobedience into our adoptive Father's spirit family with all the rights and privileges of His only true Son, Jesus.
We all need to allow the Spirit to renew our minds to lesson our desire to sin and remind us that Satan is still alive and well seeking to deceive us all.. We have free will. I used that free will to believe the Gospel and accept Jesus as my lord.. At anytime before I die, Satan can try to make me an offer I can't refuse. Fame, fortune, power, sex, or whatever he thinks he can lure me with. I still have free will. I can turn my back on God and go with Satan for the goodies. That is why we are to stay vigilant until the end.
While I was away I see this is called a sin of presumption. God cannot lie. He says I have salvation unless I blaspheme His Spirit. How can it be a presumptuous to believe Him.
May God the Father lead us to His truth, BVB
Gladly. Given the deposit of faith:
contend earnestly for the faith once delivered to the saints. (Jude 1:3)
A subset recorded:
Many other signs also did Jesus in the sight of his disciples, which are not written in this book. [31] But these are written, that you may believe that Jesus is the Christ, the Son of God: and that believing, you may have life in his name. (John 20:30-31)there are also many other things which Jesus did; which, if they were written every one, the world itself, I think, would not be able to contain the books that should be written. (John 21:25)
you can judge these non inspired individuals
[The Bereans] were more noble than those in Thessalonica, who received the word with all eagerness, daily searching the scriptures, whether these things were so. (Acts 17:11)
The work of Chrisitans may be inspired at all times
I will ask the Father, and he shall give you another Paraclete, that he may abide with you for ever (John 14:16) ... he will teach you all things, and bring all things to your mind, whatsoever I shall have said to you.(Ibid 14:26)
Only the version of Scripture you provided states you will not sin at any time. Most say stumble.
True. The original says "μη πταισητε", "make a false step" (link). Which is a stronger statement than "you shall not sin": you shall not even stumble. Did you read the entire passage? It clearly says that you must work on your character and faith as a disciple to make sure your election. Use any translation you like, we can iron out translation problems later.
He says I have salvation unless I blaspheme His Spirit.
No, He says that you can be forgiven. That is Catholic teaching: any sin can be washed away in confession. You, too, can confess your sin of presumption learn the proper doctrine and resume your path toward your salvation in the Cathilic Church that Christ purchased for us with His blood us for that purpose.