Because.....
SPIRITUAL TRUTHS ARE SPIRITUALLY DISCERNED
1 Corinthians 1:18-31 For the word of the cross is folly to those who are perishing, but to us who are being saved it is the power of God. For it is written,“I will destroy the wisdom of the wise, and the discernment of the discerning I will thwart.”
Where is the one who is wise? Where is the scribe? Where is the debater of this age? Has not God made foolish the wisdom of the world? For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what we preach to save those who believe. For Jews demand signs and Greeks seek wisdom, but we preach Christ crucified, a stumbling block to Jews and folly to Gentiles, but to those who are called, both Jews and Greeks, Christ the power of God and the wisdom of God. For the foolishness of God is wiser than men, and the weakness of God is stronger than men.
For consider your calling, brothers: not many of you were wise according to worldly standards, not many were powerful, not many were of noble birth. But God chose what is foolish in the world to shame the wise; God chose what is weak in the world to shame the strong; God chose what is low and despised in the world, even things that are not, to bring to nothing things that are, so that no human being might boast in the presence of God. And because of him you are in Christ Jesus, who became to us wisdom from God, righteousness and sanctification and redemption, so that, as it is written, “Let the one who boasts, boast in the Lord.”
1 Corinthians 2:1-16 And I, when I came to you, brothers, did not come proclaiming to you the testimony of God with lofty speech or wisdom. For I decided to know nothing among you except Jesus Christ and him crucified. And I was with you in weakness and in fear and much trembling, and my speech and my message were not in plausible words of wisdom, but in demonstration of the Spirit and of power, so that your faith might not rest in the wisdom of men but in the power of God.
Yet among the mature we do impart wisdom, although it is not a wisdom of this age or of the rulers of this age, who are doomed to pass away. But we impart a secret and hidden wisdom of God, which God decreed before the ages for our glory. None of the rulers of this age understood this, for if they had, they would not have crucified the Lord of glory. But, as it is written,
“What no eye has seen, nor ear heard, nor the heart of man imagined, what God has prepared for those who love him”—
these things God has revealed to us through the Spirit. For the Spirit searches everything, even the depths of God. For who knows a person's thoughts except the spirit of that person, which is in him? So also no one comprehends the thoughts of God except the Spirit of God. Now we have received not the spirit of the world, but the Spirit who is from God, that we might understand the things freely given us by God. And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths to those who are spiritual.
The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned. The spiritual person judges all things, but is himself to be judged by no one. “For who has understood the mind of the Lord so as to instruct him?” But we have the mind of Christ.
God's Truth is His Truth and stands alone as authoritative by its very nature as God's truth, regardless of man's ability or inability to correctly discern it.
Man's inability to correctly discern God's Word does not invalidate it nor mean that relying on it alone is not valid.
If relying on God's word alone is invalidated because sinful men are incapable of correctly discerning it, then *sacred tradition* is likewise invalidated because men are no more capable of correctly discerning that than Scripture.
The fault is not with the source, the Word, it's with the men interpreting it.
Whatever arguments are used against sola Scriptura, can be used against any teaching of Catholicism, thus, buy rejecting sS, you are forced into a position of rejecting your own church's teachings.
“Man’s inability to correctly discern God’s Word does not invalidate it nor mean that relying on it alone is not valid.”
Amen. Barring exceptions (e.g. those without access to Scripture), where does one receive wisdom from God? Those who go away from or pooh-pooh the Word usually tout “experiences” and “inspiration” as if those are superior to FAITH WITHOUT SEEING.
Gods Word remains fresh and green and STABLE when experiences and inspiration are all over the map.