Maimonides wrote a responsum lifting the decree of Ezra, based on an opinion in the Talmud stating that it had failed to be observed by a majority of the community and the Jewish people found themselves unable to sustain it. However, Maimonides continued to follow the Keri restrictions as a matter of personal observance. Since then, observance of the rules of Keri and hence regular mikveh use by men fell into disuse in many communities.[citation needed] Hasidic Judaism, however, revived the practice of regular mikveh use, advocating regular daily mikveh use as a way of achieving spiritual purity.