רְאוּבֵן֙ בְּכֹ֣רִי

Reb Yakov Leib: the Eyn Sof of Kabbalah is virtually identical to the Tao of Taoism and the Brahman of Hinduism -- both of which define the Absolute Creator as limitless, indefinable and without attributes. And although merely a speculation, it is possible that the latter may, indeed, have come from the former through the Sons of Keturah who, the Bible tells us, were missionaries to the "East countries" for the esoteric portions of their father Abraham's new religion. (Genesis 25:1-6) In this regard, a Chinese inscription on a pillar of the ancient synagogue of Kei Feng reads,

"Through Abram the Religion [of China] was established, and its Laws had no visible image [i.e., they came from Eyn Sof]." (Chinese Jews, William Charles White, editor, page 146.)

Similarly, another pillar-inscription in the Kei Feng Synagogue reads:

"From the time of Abram, when [his] religion [was taught to us by talented men of Western India] men of China have diffused instruction, and obtained complete knowledge of Confucianism, of Buddhism, and of Taoism." (ibid. page 138.)

This last Chinese text, in particular, supports the theory that Hinduism, Confucianism, Buddhism and Taoism -- all of which are based on an Eyn-Sof conception of the Absolute Godhead -- may have originally emerged from Abrahamic teachings brought to India and China by his sons through Keturah.