Very shaky. I agree wholeheartedly.
That's what the Catholic Magisterium is for - to decide as a God-fearing group inspired by the Holy Spirit, rather than an individual who would be more inclined to follow a whim.
Personally, I eschew all of the doctrines and traditions of men - whether by the Pope, Calvin, Arminius, Billy Graham, Joseph Smith and so on. That is the leading I have in the indwelling Spirit.
But God did not make us to be "cookie cutter" Christians. Peter wasn't like John who wasn't like Paul who wasn't like Thomas. And the foundation of the New Jerusalem consists of twelve very different gemstones, symbolizing both the differences and acceptability among the apostles.
My function in Christ's body is probably different from yous. So it's plenty ok with me that you are Catholic and I am not.
May God bless you always, dear MarkBsnr!
Our differences are founded in this very thought. Protestants believe the Holy Spirit speaks directly to individual believers through Scripture and prayer. To read the Bible is to know this for a fact.
We're instructed to worship God as a congregation of believers, to study Scripture together and rightly divide the word of God, but we are never to doubt the Holy Spirit is leading our study.
It's true that some men think they are being led when they are not. But that does not negate the absolute fact that some men, by the grace and will of God alone, are being led in righteousness to all truth.
For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. The Spirit itself beareth witness with our spirit, that we are the children of God: And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together." -- Romans 8:14-17"For as many as are led by the Spirit of God, they are the sons of God.
Our job is to read the Scriptures and...
"Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth." -- 2 Timothy 2:15
And in doing so, we will "prove what is that good, and acceptable, and perfect, will of God" (Romans 12:2).