{I was in the Spirit} (egenom(886e) en pneumati). Rather, "I
came to be (as in  1:9 ) in the Spirit," came into an ecstatic
condition as in  Ac 10:10f.  22:17 , not the normal spiritual
condition (einai en pneumati,  Ro 8:9 ). {On the Lord's Day}
(en t(8869) kuriak(8869) h(886d)er(8369)). Deissmann has proven (_Bible
Studies_, p. 217f.; _Light_, etc., p. 357ff.) from inscriptions
and papyri that the word kuriakos was in common use for the
sense "imperial" as imperial finance and imperial treasury and
from papyri and ostraca that h(886d)era Sebast(885c) (Augustus Day) was
the first day of each month, Emperor's Day on which money
payments were made (cf.  1Co 16:1f. ). It was easy, therefore,
for the Christians to take this term, already in use, and apply
it to the first day of the week in honour of the Lord Jesus
Christ's resurrection on that day (_Didache_ 14, Ignatius _Magn_.
9). In the N.T. the word occurs only here and  1Co 11:20 
(kuriakon deipnon the Lord's Supper). It has no reference to
h(886d)era kuriou (the day of judgment,  2Pe 3:10 ). {Behind me}
(opis(9320)mou). "The unexpected, overpowering entrance of the
divine voice" (Vincent). Cf.  Eze 3:12 . {Voice} (ph(936e)(886e)). Of
Christ, as is plain in verses  12f . {As of a trumpet} (h(9373)
salpiggos). So in  4:1  referring to this. {Saying}
(legous(8873)). Present active participle genitive case agreeing
with salpiggos rather than legousan, accusative agreeing with
ph(936e)(886e). So on purpose, as is clear from  4:1 , where lalous(8873)
also agrees with salpiggos.