He could explain the meaning to the disciples later on when they were alone together ... The apostle Paul wrapped concepts in theological words and gave formal explanations. In careful prose he ...
D. A. Carson talks about some of the key themes that have marked his career, including his enduring passion for knowing and correctly handling God’s word and for holding tight to the gospel.
Someone during that era wrote this carol as a catechism song for young Catholics. It has two levels of meaning: the surface meaning plus a hidden meaning known only to members of the Church.