This is the sign of Ets HaChaim. When HaShem Elokim finishes the Creation from below, from Earth to Heaven, the Creation is finished. The end of one day, in true biblical terms. This is the Geula, dependent as it were on man, but really dependent on HaShem. This is Or HaGanuz, the light that was put away, guarded by the C'ruvim, and by the blade of the turning sword, for the time of the Geula.
עֵץ חַיִּים הִיא לַמַּחֲזִיקִים בָּהּ וְתֹמְכֶיהָ מְאֻשָּׁר
משלי ג, יח
