Ganga comes from the Sanskrit root ‘to go’ and also the root forming ‘gyan’ or knowledge. It is a river that flows from the higher realms to lower ones. In today’s language, we can call this the flow of intuition or intuitive intelligence. The seeker on the path experiences this flow of truth as intuitive intelligence or the birth of viveka. To be able to use this flow of truth that has sprung up in the heart of the disciple, it must marry the logical mind, depicted by Shantanu.
Before the intuitive intelligence can connect with the logical mind, there is a long period of waiting where the student first holds and digests the truth experienced. This is shown where Ganga first goes to meet King Prateep and sits on his right thigh. The flow of truth can only be expressed by the logical brain and initially there is a mismatch as it tries to find expression through a wrong instrument or the non-logical brain. Here the non-logic is shown as she having to wait for her instrument of expression to be born. The experience of truth is a flash, fast but one has to hold it because the speed of the logical brain is too slow to have clarity in expression and this requires the patience of waiting for one full generation.
Once the inner viveka starts flowing within the disciple, like the river Ganga, one must look after it like a soft flower. Then, one can feel the truth while our logical brains can see only the fact. Shantanu as the logical brain thinks Ganga is killing her sons while Ganga, who feels the truth beyond the fact of sons, is providing freedom to certain souls. As long as we have only our logical minds to guide us, we will keep mistaking the facts we see as truth.
If a disciple, at any time, with his logical brain starts doubting his viveka, it will desert him that very moment, and it will take a long cycle of suffering and pain for it to return. He has to let it flow and just act the way it directs him. The minute Shantanu questions Ganga, she leaves him.