I find this interesting. I don't know everything so maybe someone can walk through this with me.
So to put it simply here is what I know of the "Bija Mantra".
Bija means seed. Or sometimes more broadly essence or root. And Mantra we know is just a sound created over and over. A Bija Mantra is a sound that corresponds to a chakra to empower it.
Probably that's a really wide definition. Because runes also do the same thing to empower chakras yet I never hear them called bija mantras. But the point is that we can sort of understand and use the Bija Mantra.
I have not heard of the term "Shakti Mantra" before this. What is it used for and how does it work? How does it differ from the Bija Mantra? Is the goal the same in the use of both?
Where did you get this from? It's not on ToZ. And you say tantric texts. Is this something I can buy on amazon kindle?
Don't get me wrong I have a favorable view of Hinduism. And it's obviously our roots.
But on a certain level I also hate it and wish it were dead. Because pulling these things from the Hindu texts is just way beyond the reach of the average Zevist. They would be better off spending 1 hour meditating than 1 hour in the cluster fuck of Hindu texts.
So I hope it dies.
And I hope that a new generation of advanced spiritual leaders emerge in the White Western world. That write and cover everything from cradle to grave, or cradle to immortality. And people can focus on just reading and consuming the truth written in their own culture and words. So that they may spend their time gaining insight and applying it rather than wasting all their time playing spiritual Scooby-Doo.
You seriously have to become a University Professor if your going to get anywhere in Zevism. Which is fine for people that are interested in various things. But it would also be better for our time to just pick up and read plainly written texts that we understand. Which is what these texts were to the people reading them originally.
Beyond the seeds of truth in the texts they are divorced from the people and don't really serve us like they used to. So it's time to build a new religion for people living now.
And before anyone gets mad. I don't hope that Hinduism really dies. Let's keep the texts and temples. And in India the culture. But white Westerners need their own India. Which they must forge for themselves in the future. The East must end as the Monopoly on spiritual resources. And the West needs to rise up.
Bija mantras are mantras that are based on simple germ sounds. And structured in a specific way
Bija mantras have 3 main components:
Bija -the sound that makes the mantra unique and distinguished in its effects
Nada - The U sound which expands the energy.
And Bindu, the M that concentrates the raised energy for manifestation.
For example the bijamantra of the fire element: RA (bija)-U (Nada)-M (Bindu)
If you remove the Nada and Bindu part the mantra will remains the same, significantly weaker however. If you change the bija from RA to VA you have a totally different mantra. That is why It's called Bija, since that is the most essential component.
Shakti mantras on the other hand are a complex but condensed combination of sounds that raise a particular type of Power (Shakti) For example the mantra KRIM you have the K sound, the first consonant of the sanskrit alphabet ruling over manifestation, time, action (k-ala, k-arma) The R adds fire, while I gives direction to the raised energy. -it differs in structure from the bija mantra. Shakti mantras have a more direct impact on your energy system, since they are all about Shakti/Power/Energy.
Do you find this on the ToZ? Yes:
-In the numerous sermons stating that sanskrit is a language based on words of power.
-in the kabballistic square section you can find many of these mantras - Hrim for Sun, Krim for Mars etc.
You can buy translated tantric texts and even download many of these for free along the work with vedic/tantric scholars.
As for your commentary on hinduism: This isn't about hinduism, It's about the science of mantras, spirituality. Not a particular sect or religion.