That's funny. My Bible says:
Luk 2:29 Lord, now lettest thou thy servant depart in peace, according to thy word:
And that while the scripture clearly states "the Holy Ghost was upon him" in verse 25.
Maybe you need a better Bible.
Seeing that you are attempting to use this story from Luke 2 as a proof that there is a case for "extra-Scriptural" revelation that permits "special" people to create doctrine for the Christian faith that is NOT backed up by Holy Scripture, let me remind you that Simeon quoted verses from the prophet Isaiah among other Scriptures. He made no further prophecies and Luke confirmed, under the inspiration of the Holy Spirit, that Simeon had been told by the Spirit that he would not die until he looked upon the Messiah.
To extrapolate from this that the Catholic Church has the authority to "make it up as they go along" is foolish. The church father, Athenagoras, says:
"If we satisfied ourselves with advancing such considerations as these, our doctrines might by some be looked upon as human. But, since the voices of the prophets confirm our arguments-for I think that you also, with your great zeal for knowledge, and your great attainments in learning, cannot be ignorant of the writings either of Moses or of Isaiah and Jeremiah, and the other prophets, who, lifted in ecstasy above the natural operations of their minds by the impulses of the Divine Spirit, uttered the things with which they were inspired, the Spirit making use of them as a flute-player breathes into a flute;-what, then, do these men say? 'The Lord is our God; no other can be compared with Him.' And again: 'I am God, the first and the last, and besides Me there is no God.' In like manner: 'Before Me there was no other God, and after Me there shall be none; I am God, and there is none besides Me.' And as to His greatness: 'Heaven is My throne, and the earth is the footstool of My feet: what house will ye build for Me, or what is the place of My rest?' But I leave it to you, when you meet with the books themselves, to examine carefully the prophecies contained in them, that you may on fitting grounds defend us from the abuse cast upon us." (A Plea for the Christians, 9)
As I said before, you can consent to believe whatever you are told by your self-entitled "infallible" magesterium is to be held as de fide, and you can trust your eternal salvation upon the decrees and musings of men who assert their authority over the Holy Scriptures but I will place my hope and trust upon the truth of God's word and agree with Irenaeus who said:
These things are such as fall plainly under our observation, and are clearly and unambiguously in express terms set forth in the Sacred Scriptures....the entire Scriptures, the prophets, and the Gospels, can be clearly, unambiguously, and harmoniously understood by all" - Irenaeus (Against Heresies, 2:27:1-2)