Many of Rabbi Elyashiv’s rulings and words, many dating back over fifty years, have been collected in writing and have been published – not by Rabbi Elyashiv himself, but by his students and relatives – in sefarim, offering insights on the Torah. The published works include a Pesach Haggadah; the multi-volume responsa Kovetz Teshuvos; a work of his halachic rulings, Yashiv Moshe; and a collection on Jewish thought called Divrei Aggadah, among others. Rabbi Elyashiv was also respected as a kabbalist and was once described by Rabbi Aharon Leib Steinman as the only person in our generation who understands Kabbalah.
Despite several difficult illnesses, Rabbi Elyashiv continued his rigorous schedule until his final days, outliving the many doctors who had forecast his imminent passing from his youth onward.