“‘Remember bygone days’… the importance of having an appreciation for history… to understand the changes from one generation to the next… each generation has its own set of problems and own set of rules and own set of circumstances.
We must… couple that remembrance with an understanding of the changes that take place in each generation.
Eliyahu HaNavi … was the one designated to resolve all of the Talmud’s ‘Teykus’ [acronym used by the Talmud to indicate a question remains unresolved until Tishbi (Elijah) will provide the resolution]… because Eliyahu never died — he has been around in all generations. We need someone who has an understanding of each generation to pasken the shaylos [issue Rabbinic rulings on Halachic questions] for that generation. Therefore, only Eliyahu, who was present during all generations, is qualified to resolve the ‘Teykus’.”