— VerifyYourBrain

The people of the Earth speak a variety of languages, and concepts and knowledge of our progenitors continue to be communicated through generations, hundreds of generations, of their posterity, which end up being stated in languages that diverge from their original language. Because of this, similar ideas and concepts are expressed in different words. It is difficult to differentiate between the same idea expressed in different words from different ideas expressed in different words.

I admire you because you seek to pierce that veil of ignorance that separates our peoples. The idea of Valhalla is that valiant warriors that fall in battle are feted in the afterlife. There are differences in details, but I will offer that same idea exists in Christianity, and in all religious faiths. There is more consonance in our principles than divergence, because people are more similar than they are different around the world.

The word translated as heaven in the original greek refers to that universe beyond the Earth which cosmology and astronomy discuss. That doesn't make them different things. It just is different discussions about what is referred to in different languages, from different perspectives. I suggest that admiration for the valiant is a universal attribute in all cultures, religions, and societies, and Valhalla and heaven can well be considered to be words referring to the same thing in different languages by different cultures that have maintained our common understanding in divergent ways over many, many generations.