The link between wearing distinctive clothing in honor of Shabbat, and the garments of the soul that result from good deeds.
Avraham blesses everything in the world, and this ability stems from Hashem's blessing of each of the avot with the attribute of kol (everything). We refer to these Divine blessings as ba-kol, mi-kol, kol, based on psukim (verses) that invoke these words in the context of each of the avot (Bava Batra 17a). Each of the avot are represented by each of the three shabbat meals on Shabbat--the day Hashem blesses as the day of the week which holds the blessing of shalom (peace). Shabbat Shalom.
The shvua (vow) at the end of the akeida (Binding of Yitzchak), like the gift of Shabbat, transcend the worthiness of the Jewish People to receive them. Shabbat invites us to re-connect with the inspiration of the Avot (Patriarchs), and with the or ha-ganuz (hidden light) implanted within us.
Understanding the spiritual journey of Avraham Avinu, and its link to zachor v'shamor of Shabbat.
The tzaddik guards the "covenant of the world" by revealing the inner point (nekuda pnimit) within every aspect of Creation; in withdrawing from creative acts of labor on shabbat, the Jewish People guard this covenant on a weekly basis.
The human being is physically created on Friday, then serves as the connector of the World to its Creator--and testifies to this spiritual connection by observing Shabbat.