After coming out of the White Cloud Temple, Yusuf Zuck put on the Taoist robe, and he finally understood why Fatty had cried.
Because the moment he put on the robe, a weak voice came through—it was the voice of a person on the brink of death, a man confessing his deep feelings, and his last words before passing away.
This robe wasn't their true legacy; it was merely a token of a lifelong commitment. It was something they left behind before their Ascension to the Heavenly Realm. At the time of leaving the robe, they were happy because they were about to ascend and become divine. They left this robe as a token of their committed love, waiting for a destined person in the future, someone whose nature matched theirs.
Moreover, the two robes contained special prohibitions connected to their divine spirits. Thus, even in the Heavenly Realm, even after becoming deities, they would sense anyone who touched the robes!
However, they died before such destined person came along.