The Zohar reflects that civilization as we know it started with Jacob. Before him, civilizations rose and fell without a trace. The sons of Jacob originated the twelve tribes of Israel. This too has a hidden significance.
The twelve tribes correspond to the celestial influences emanating from the twelve constellations. The power of Jacob and the patriarchs is in their ability to rise above any negative influences streaming down from the heavens. Using the mystic secrets of the Torah, they took control over the signs and captained their own destiny. This governing power over the stars is bequeathed to the reader of this passage.