The experience of reading Introduction to the Science of Religion sent me the idea of writing these words. Through the book, half of origin thoughts of religion were changed.
Three language groups are divided: Turkic, Semitic, Aryan. Instead of repeating the past theories, Muller gave them one shared ancestor, which stemmed from his study called Comparative Linguistics. By comparing different languages in different places, common features in languages were found. Then the same word in different languages could point out the users have the same concept of some appointed thing. Owning the same concept could introduce the same culture that divided to parts long ago.
One of the great works contributed by Comparative Linguistics is explaining the words used to be misrepresented in authorities. People used to explain the words with a modern way of thinking. But the words in the past, especially in Aryan, were used to refer to one concept but not literally. Studying authorities without the users’ way of thinking now is unacceptable.