Any internal desire is expressed through an external act as we know. and the external form reflects the internal desire. Jacob’s act and desire was to gather his children together. His final act was to unite them all, because only when unite the hidden knowledge can reappear and educate us. This Shabbat is called Shabbat Chazak“ the Shabbat of reinforcement” because of the custom of declaring, Chazak, Chazak, Vinischazaik (“Be strong, be strong, and may you be strengthened”)