The Jews having rejected the cornerstone, which is Christ, the question is, "How can they ever build upon that sure and firm foundation?" Jacob, being led by the spirit of prophecy promises to unfold that mystery. That Christ may become the head of their corner, the Rock of their Salvation he will make known unless in his anxiety for his brethren he is shaken in his firmness in the spirit. In other words he asks for their faith and prayers, as we do today. That the spirit of prophecy may enlighten their minds and that they may understand what is being unrolled is his prayerful wish. He then proceeds to explain this mystery by quoting the Prophet Zenos.