The Zohar reveals that only when Jacob came the world, the world could have stability and balance.
Jacob unified the right column (Abraham) and the left column (Isaac) of the Tree of Life.
Abraham lived 175 years.
Isaac was born when Abraham was 100.
Jacob was born when Isaac was 60 years old. The sages say that Jacob started studying Torah immediately after he was born.
Abraham, Isaac and Jacob studied together for 15 years.
During these 15 years, Abraham and Isaac gave Jacob connection to the upper levels of Chokmah and Binah represented by the letters YH יה with numeric value of 15.
Jacob descendents received the Torah with the prayer of Shema Israel that helps them make the unification of Zeir Anpin and Malchut.
Hear, O Israel: YHVH our God, YHVH is one.
Israel is Jacob’s name given to him after he fought and won the angel of the other side.
Israel is the global general name to all the descendents of Jacob/Israel.
We recite the prayer of Shema Israel three times. One in the morning, one in the evening and one on the bed before we go to sleep.
The Shema Prayer at night is done after sundown. This time is the beginning of the Central column energy.
Bedtime Shema text and explanations
Text and study video