The Rebbe addresses the importance of spreading Judaism and Chassidus in Jerusalem, emphasizing that the city's added holiness requires an increase in personal sanctity. He explains that everyone has the ability and responsibility to participate in this work, which is rooted in Torah, mitzvos, and Ahavas Yisrael.
https://www.torahrecordings.com/rebbe/igroskodesh/017/009/6350