11. Διὸπαρακαλεῖτεκτλ.] Cf. 4:18, διό here taking the place of ὥστε, as serving better to sum up the different grounds of encouragement contained in the whole section 4:13– 5:10. καὶοἰκοδομεῖτεκτλ.] ‘ and build up each the other’ (Vg. aedificate alterutrum, Beza aedificate singuli singulos)— the first occurrence of a favourite Pauline metaphor, perhaps originally suggested by our Lord’ s own words (Matthew 16:18; cf. Matthew 7:24 ff.), and here used in its widest spiritual sense (cf. 1 Corinthians 14:4). Blass (p. 144) traces the unusual combination εἷςτὸνἕνα ( = ἀλλήλους) to Semitic usage, but it finds at least a partial parallel in Theocr. 20. (22.) 65 εἷςἑνὶχεῖραςἄειρον. The nearest N.T. parallel Isaiah 1 Corinthians 4:6 ἵναμὴεἷςὑπὲρτοῦἑνὸςφυσιοῦσθεκατὰτοῦἑτέρου, ‘ St Paul’ s point there being the dividing effect of inflatedness or puffing up, as here the uniting effect of mutual building up’ (Hort Ecclesia p. 125 n.1): cf. also Ephesians 5:33 οἱκαθʼ ἕνα, and in mod. Gk. the phrase ὁἕναςτὸνἄλλον. καθὼςκαὶποιεῖτε] Grot.: ‘ Alternis adhibet hortamenta et laudes: quasi diceret, σπεύδοντακαὶαὐτὸνὀτρύνω— festinantem hortor et ipsum.’