לקוטי שיחות חלק לג - פנחס ג

The Rebbe begins by describing how Shabbat and yom tovim each possess their unique kinds of holiness. Shabbat is referred to as having a holiness that comes directly from Hashem and is thus immutable, requiring no input from the earthly realm. Conversely, the observance of yom tovim involves human participation in sanctifying the new month.

The Rebbe delves deeply into the halachic implications of this difference, explaining that Shabbat's fixed timing reflects a constant divine sanctity. Meanwhile, festivals depend on human action — specifically the declaration by Beis Din — reflecting a partnership between higher and lower forces (supernal and terrestrial).

This teaching extends further into discussing spiritual lessons for divine service. In relation to G-dliness, humans are always working in a world where they strive toward elevating their abilities to connect with Hashem’s eternal power. Understanding these roles leads to living with greater purpose — appreciating both divine constancy (Shabbat) and human initiative in holiness (festivals).