It has been seen and heard frequently that individuals, even atheist or Buddhist or cow worshipper, have been healed by visiting their own temples and holy places. Explain that how this happens?

It has been seen and heard frequently that individuals, even atheist or Buddhist or cow worshipper, have been healed by visiting their own temples and holy places. Explain that how this happens?
The healing of servants is from God, and He is the One who satisfy their needs, whether they are aware of it or unaware of it; as He has said: ﴿كُلًّا نُمِدُّ هَؤُلَاءِ وَهَؤُلَاءِ مِنْ عَطَاءِ رَبِّكَ ۚ وَمَا كَانَ عَطَاءُ رَبِّكَ مَحْظُورًا﴾[1]; “To these and to those—to all We extend the bounty of your God, and the bounty of your God is not confined”! He does not cut off the livelihoods of His deniers by virtue of their denial and does not ignore the needs of his enemies by virtue of their enmity; since if they do not know Him, He knows them, and if they do not care about Him, He care about them, and this is the manifestation of His mercy and the manifestation of the name of the most merciful; as one of our helpers informed us, said:
«كُنْتُ مَعَ الْمَنْصُورِ الْهاشِمِيِّ الْخُراسانِيِّ فِي مَسْجِدٍ فَسَمِعَ رَجُلًا يَدْعُو اللَّهَ تَعالَى فَيَقُولُ: <يا مَنْ يُؤْتِي مَنْ لا يَسْأَلُهُ وَمَنْ لا يَعْرِفُهُ تَحَنُّنًا مِنْهُ وَرَحْمَةً>، فَأَخَذَهُ الْبُكاءُ ثُمَّ قالَ: كَذَلِكَ اللَّهُ رَبُّنا، يُؤْتِي مَنْ لا يَسْأَلُهُ وَمَنْ لا يَعْرِفُهُ وَمَنْ يَسْأَلُ غَيْرَهُ يَأْتِي إِلَى شَجَرٍ فَيَسْأَلُهُ فَيُؤْتِيهِ اللَّهُ تَعالَى فَيَنْصَرِفُ وَهُوَ يَقُولُ: <آتانِيَ الشَّجَرُ> وَأَنَّى لِلشَّجَرِ أَنْ يُؤْتِيَهُ؟! أُولَئِكَ هُمُ الْغَافِلُونَ!»; “I was in a mosque with his honor Mansoor Hashemi Khorasani, then he heard a man praying to almighty God and saying: <You! One who give to someone who does not ask Him, and someone who does not know Him out of kindness and mercy>, then his honor started crying and then said: our God is like this, He give to someone who does not ask Him, and to someone who does not know Him, and to someone who asks from other than Him, comes to a tree and asks from it, then almighty God give to him, then he returns while saying: <the tree gave me> and where the tree can give him?! They are indeed heedless individuals!”