<p>9:10 <em>And not only so, but Rebecca also having conceived by one, by our father Isaac</em>- &quot;Conceived by one&quot; is hard to make sense of. Perhaps the idea is that Rebecca was Isaac's only wife. But the next verses speak of how out of two children, the choice of which one was to be the seed was made on the basis of predestination. Both Jacob and Esau had the same one father; but one was chosen and the other wasn't. Abraham had children by various women (Hagar, Keturah and Sarah at least); Isaac had children by only one woman. So there was no question about whether Esau and Jacob were in the right line, as it were. But the point was, a choice was made by predestination and calling.</p>