When the illusion of time disappears, we are left wandering what we need to do. And when that thought dissipates, we realize that there is nothing "we" really need to do - except "be". This is the essence of Shabbat. The essence of true joy. Not synthetic happiness that makes us believe we will be happy when get this or that or when we achieve this or that. The six days of our week help us appreciate that all our "doing" is really an illusion compared to the true values we experience during Shabbat. Family. Songs. Joy. Prayer. Food. Simplicity.
Shabbat is the elevation of time for true spiritual awakening.
Lecha Dodi Likrat Kala - Come my beloved, lets meet the bride
Peni Shabbat Nekabelah - "Accept" the Presence of "Being"