"श्री" literally is used as a form of salutation, as the examples you state. It is also used to signify a start as a form of respect. श्री is often used in beginning of the name.
there is nothing wrong in saying श्री विष्णू etc. The use depends on what you are doing.
In "ॐ नमः शिवाय" om is used as a beeja matra. Every god has a beeja or the mantra in specific uses certain beeja which are like seeds.
For e.g. the om: ॐ, Kreem: क्रीं, Shreem: श्रीं, Hroum: ह्रौं, Hreem: ह्रीं etc. are Beeja Mantra
In general shree is used for god in human form is not true.
It is also used for others like sarpa, yakshas etc. Shree is more used as a salutation and is a signature of good (शुभ चिंतक). Shree is also used for titles like "shree surya sidhanta", "shree Ganpati Atharvashirsha" etc.
One interesting thing is have you heared Shree Shiva?
We have no idea why shree is not used before shiva. But for diffrent names of Shiva specifically "mahesh", "mahadev" we have seen people saying shree before them.
A reason might be shiva also means auspicious and pure and shree is itself a signifier of auspiciousality hence why would three be shree before shiva?
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Pitru runam means we are indebted to our ancestors for giving us birth , education ,samskAras, without them we would never come to this world. The shraddha and tarpana rituals are utmost important because its our dharma & pleasing pitru devatas will bless with health and wealth
But there may be situations where we cannot perform shraddha or tarpana rituals in that case chatur mukha brahma gave us stotra to give us the fruits of shraddha/tarpana rituals
nama: pitrae janmadaatrae sarva daevamayaaya cha
sukhadaaya prasannaaya supreetaaya mahaatmanae
Salutations to pitru devatas, who gave me birth and who are filled with all devas,
And who bless us with pleasure, who are happy and are great ones liked by good people
Pitra Dosh– In contrast to the misconception of it being the curse from forefathers, Pitra Dosh is actually a karmic debt of the ancestors. It is reflected in the Kundli in a form of malefic planetary combinations and is to be paid by the person having Pitra dosha in his Kundli.
To put it simply, Pitra dosh is formed in a person’s horoscope, when his/her ancestors have committed some sin or mistake. So, in exchange for that, the native is held accountable to pay for the wrongdoings of their forefather’s past deeds by going through various punishments.
Presence of Pitra Dosha in one’s horoscope may bring about some inevitable and unexpected hardships in the native’s life. It causes severe ups and downs in one’s lifespan. The native tends to suffer from a lack of mental decisiveness and money.
Alakshmi or Jayestha is the elder sister of Goddess Lakshmi. She represents everything that is opposite of Lakshmi. She is the Goddess of misfortune, strife, poverty, 'durbhagya' , inauspiciousness and extreme ugliness.
Where did Alakshmi come from :
Alakshmi is said to have emerged with Ma Lakshmi during the churning of the ocean of milk or 'samudra manthan'. While Lakshmi emerged with the 'amrit' or nectar, Alakshmi emerged with the 'halahal' or poison.
yet some believe, Lakshmi was born from the radience of Lord Brahma's face while Alakshmi was born from the darkness of his back
As we know maa Tara was wife of king Vali and mother of Angad she is also one of "Panchkanya ". She was daughter of Sushena, a physician in the country of Kishkindha. Today we will try to understand her story
Later, due to some family issues between her husband Vali and his brother Sugriva, Vali was killed by Rama. The issue was the separation of Ruma from her husband, Sugriva.
Even though Vali was killed by Rama and Tara felt very sad, she later showed her boldness as an able queen of that country. During the cremation of the physical body of her husband, with great grief,