[2:20] 1 tn Grk “having been built.”
[2:20] 2 sn Apostles and prophets. Because the prophets appear after the mention of the apostles and because they are linked together in 3:5 as recipients of revelation about the church, they are to be regarded not as Old Testament prophets, but as New Testament prophets.
[2:20] 3 tn Grk “while Christ Jesus himself is” or “Christ Jesus himself being.”
[2:20] 4 tn Or perhaps “capstone” (NAB). The meaning of ἀκρογωνιαῖος (akrogwniaio") is greatly debated. The meaning “capstone” is proposed by J. Jeremias (TDNT 1:792), but the most important text for this meaning (T. Sol. 22:7-23:4) is late and possibly not even an appropriate parallel. The only place ἀκρογωνιαῖος is used in the LXX is Isa 28:16, and there it clearly refers to a cornerstone that is part of a foundation. Furthermore, the imagery in this context has the building growing off the cornerstone upward, whereas if Christ were the capstone, he would not assume his position until the building was finished, which vv. 21-22 argue against.
