What is Ramanujacharya's argument that the Upanishads must be true if they grant Moksha?
He's not talking about moksha in that passage. He's saying that an idea that we think is false, won't actually convey any satisfaction to us:
When it is ascertained that a thing has no real existence, the mere knowledge or idea of the thing does not gratify. The ...
Rig Veda I.164.20 says
Two Birds with fair wings, knit with bonds of friendship, in the same
sheltering tree have found a refuge. One of the twain eats the sweet
Fig-tree's fruitage; the other eating not regardeth only.
The 2 birds mentioned, in esoteric sense, in the above mantra, are God and Individual soul in every being - 2 birds on the same tree....
In Abhramic faith God is outside and above all.
1. He is not inside everything.
2. He is not the doer of souls action and hence free will
3. No rebirth.. one life
4. Never accepted or even aware of Vedas
In dvaita or tattvavada
1. God is inside every atom
2. God is the doer of the souls action but all results of actions are attributed to souls (...
what is the original source of this quote about the cows of the gods
walking on their backs?
Rig Veda I.164.17 says
अ॒वः परे॑ण प॒र ए॒नाव॑रेण प॒दा व॒त्सं बिभ्र॑ती॒ गौरुद॑स्थात् । सा
क॒द्रीची॒ कं स्वि॒दर्धं॒ परा॑गा॒त् क्व॑ स्वित् सूते न॒हि यू॒थे अ॒न्तः
avaḥ pareṇa para enāvareṇa padā vatsaṃ bibhratī ghaurudasthāt | sā