During the advent of descending kali yuga transfer of knowledge became extremely difficult due to decline of technology. Various methods like oral story transmissions inscription in temples and rituals were invented to encrypt the knowledge. All rituals carry encrypted meanings which are revived by men of divine consciousness.
Why pour milk, ghee and honey on Shiv Linga?
Linga meaning the tongue from this the word linguistic , lingual frenulum etc have come from. A yogic technique called kechari mudra where with practice the sadhak elongated the tongue and enters the back of his throat upwards and reaches the sphenoidal sinus.
This mudra or seal with intense pranayama withdraws his senses inwards and he is dead to the world this state of consciousness is known as shiva.
The tongue in this state in called shiva linga.In advance stages of consciousness a liquid like current flows which taste like a mixture of honey and ghee.
This yogic knowledge was to be preserved hence was given the form of a ritual.
What is yagnas ? Can divine favours be attained by doing havan pooja etc?
Yagna is a process of psychological pulling and pushing the breath flow of current in opposite directions. Meaning normally the conventional nerve current from the respiratory centre in medulla via phenic nerve go down on inhalation and come up on exhalation. Signifying the Prana and apana vayu.
By reserving the current by kriya kundalini pranayama doing the opposite intense friction is created which ignites the spiritual fire in the manipuri chakra/ lumber centre.This fire is brought upwards to the mid eyebrow centre where the animal tendency of the mind and the sensory current oblations are offered.
By doing this yagna mind is concentrated hence what ever 1 wishes for one achieves this was termed as divine favours.
Why is river revered in india?
Creation is flow of consciousness hence signifies the journey of life just like the droplets from the ocean turn into a river then through the waves of duality get purified and ultimately flow into the ocean.