Musar к Мелахим А 1:1

The word אנכי is the mystical dimension of אחד, since when you "square" the letters of the word אחד, the total equals the numerical value of אנכי. The calculation is as follows: you multiply each letter in the word אחד by itself, i.e. 1 by 1=1; +8 by 8=64; +4 by 4=16. This adds up to a total of 81. The word 81=אנכי. The conceptual common denominator between the two words is that just as G–d is unique, i.e. אחד, so Rebeccah as potential founder of the twelve tribes making up the people of Israel is unique. The letters in אחד can also be read as follows: "The nation Israel consisting of 8 tribes born by Jacob's major wives ח, and 4 tribes born by Jacob's minor wives ד, together form one nation, א-אחי. The word אנכי is equivalent to the numerical value of כסא, G–d's throne, where Jacob's likeness is inscribed. After Jacob had received assurances that he would be the founder of twelve tribes, and that these tribes would enjoy G–d's blessings and be the forerunners of the eventual redemption when G–d would be "walking in their midst," he exclaimed that he had absorbed this information and that he had now received the answer to what had troubled his mother when she had questioned the value of her existence, i.e. her אנכי. The Talmud Chulin 91 even describes the ascent and descent of the angels as motivated by their desire to compare the features of Jacob with the image engraved on the throne of G–d. The angels tried to cause Jacob trouble, when G–d intervened. This is the reason why the Torah says: "Here G–d stood on top of him."