Luk 2:21 ¶ And when eight days were accomplished for the circumcising of the child, his name was called JESUS, which was so named of the angel before he was conceived in the womb.
Luk 2:22 ¶ And when the days of her purification according to the law of Moses were accomplished, they brought him to Jerusalem, to present [him] to the Lord;
Luk 2:23 (As it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord; )
Luk 2:24 And to offer a sacrifice according to that which is said in the law of the Lord, A pair of turtledoves, or two young pigeons.
Luk 2:25 ¶ And, behold, there was a man in Jerusalem, whose name [was] Simeon; and the same man [was] just and devout, waiting for the consolation of Israel: and the Holy Ghost was upon him.
Luk 2:26 And it was revealed unto him by the Holy Ghost, that he should not see death, before he had seen the Lord's Christ.
Luk 2:27 And he came by the Spirit into the temple: and when the parents brought in the child Jesus, to do for him after the custom of the law,
Luk 2:28 Then took he him up in his arms, and blessed God, and said,
Luk 2:29 Lord, now lettest thou thy servant depart in peace, according to thy word:
Luk 2:30 For mine eyes have seen thy salvation,
Luk 2:31 Which thou hast prepared before the face of all people;
Luk 2:32 A light to lighten the Gentiles, and the glory of thy people Israel.
Luk 2:33 And Joseph and his mother marvelled at those things which were spoken of him.
Luk 2:34 And Simeon blessed them, and said unto Mary his mother, Behold, this [child] is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against;
Luk 2:35 (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.
So how do you get Mary reading thoughts out of this?
This is a prophetic word to Mary that all would not be as the Jews thought it to be about the Messiah, who they thought would be a great ruler on earth in his time, this is a warning to Mary that great sorrow would come to her in being the mother of Jesus.....as in the Crucifixion.
The hearts of many being revealed has to do with Jesus and the Holy Spirit.
Hbr 4:12 For the word of God [is] quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and [is] a discerner of the thoughts and intents of the heart.
Mat 9:4 And Jesus knowing their thoughts said, Wherefore think ye evil in your hearts?
Mat 12:25 And Jesus knew their thoughts, and said unto them, Every kingdom divided against itself is brought to desolation; and every city or house divided against itself shall not stand:
Luk 5:22 But when Jesus perceived their thoughts, he answering said unto them, What reason ye in your hearts?
Luk 6:8 But he knew their thoughts, and said to the man which had the withered hand, Rise up, and stand forth in the midst. And he arose and stood forth.
Luk 11:17 But he, knowing their thoughts, said unto them, Every kingdom divided against itself is brought to desolation; and a house [divided] against a house falleth.
Luk 24:38 And he said unto them, Why are ye troubled? and why do thoughts arise in your hearts?
Now notice the indwelling of the Holy Spirit in verse 27:
Rom 8:1 ¶ [There is] therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit.
Rom 8:2 For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.
Rom 8:3 For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:
Rom 8:4 That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.
Rom 8:5 For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit.
Rom 8:6 For to be carnally minded [is] death; but to be spiritually minded [is] life and peace.
Rom 8:7 Because the carnal mind [is] enmity against God: for it is not subject to the law of God, neither indeed can be.
Rom 8:8 So then they that are in the flesh cannot please God.
Rom 8:9 But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.
Rom 8:10 And if Christ [be] in you, the body [is] dead because of sin; but the Spirit [is] life because of righteousness.
Rom 8:11 But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.
Rom 8:12 ¶ Therefore, brethren, we are debtors, not to the flesh, to live after the flesh.
Rom 8:13 For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
Rom 8:14 For as many as are led by the Spirit of God, they are the sons of God.
Rom 8:15 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.
Rom 8:16 The Spirit itself beareth witness with our spirit, that we are the children of God:
Rom 8:17 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.
Rom 8:18 ¶ For I reckon that the sufferings of this present time [are] not worthy [to be compared] with the glory which shall be revealed in us.
Rom 8:19 For the earnest expectation of the creature waiteth for the manifestation of the sons of God.
Rom 8:20 For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected [the same] in hope,
Rom 8:21 Because the creature itself also shall be delivered from the bondage of corruption into the glorious liberty of the children of God.
Rom 8:22 For we know that the whole creation groaneth and travaileth in pain together until now.
Rom 8:23 And not only [they], but ourselves also, which have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting for the adoption, [to wit], the redemption of our body.
Rom 8:24 For we are saved by hope: but hope that is seen is not hope: for what a man seeth, why doth he yet hope for?
Rom 8:25 But if we hope for that we see not, [then] do we with patience wait for [it].
Rom 8:26 Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.
Rom 8:27 And he that searcheth the hearts knoweth what [is] the mind of the Spirit, because he maketh intercession for the saints according to [the will of] God.
Rom 8:28 And we know that all things work together for good to them that love God, to them who are the called according to [his] purpose.
Rom 8:29 For whom he did foreknow, he also did predestinate [to be] conformed to the image of his Son, that he might be the firstborn among many brethren.
Rom 8:30 Moreover whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified.
Rom 8:31 ¶ What shall we then say to these things? If God [be] for us, who [can be] against us?
Rom 8:32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?
Rom 8:33 Who shall lay any thing to the charge of God's elect? [It is] God that justifieth.
Rom 8:34 Who [is] he that condemneth? [It is] Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us.
Rom 8:35 Who shall separate us from the love of Christ? [shall] tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?
Rom 8:36 As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter.
Rom 8:37 Nay, in all these things we are more than conquerors through him that loved us.
Rom 8:38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
Rom 8:39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.
....it is through the power of the Holy Spirit indwelling many will be saved, nothing to do with Mary reading hearts. Once again people trying to get rid of God's works in the Spirit and replace it with Mary, imo.