Midst - Vine's Expository Dictionary of New Testament Words
Midst
[ A-1,Adjective and Adverb,G3319, mesos ]an adjective denoting middle, in the middle or midst," is used in the following, in which the English requires a phrase, and the adjectival rendering must be avoided: Luke 22:55, "Peter sat in the midst of them," lit., "a middle one of (them):" Luke 23:45, of the rending of the veil "in the midst;" here the adjective idiomatically belongs to the verb "was rent," and is not to be taken literally, as if it meant "the middle veil;" John 1:26, "in the midst of you (standeth One)," RV (lit., "a middle One"); Acts 1:18, where the necessity of avoiding the lit. rendering is obvious. Cp. the phrases "at midday," "at midnight" (See MIDDAY, MIDNIGHT, above). Notes:
(1) Mesos is used adverbially, in prepositional phrases,
(a) ana m., e.g., 1 Corinthians 6:5, "between;" Matthew 13:25, "among;" Revelation 7:17, "in the midst;"
(b) dia m., e.g., Luke 4:30; Luke 17:11, "through the midst;"
(c) en m., Luke 10:3, RV, "in the midst," AV, "among;" so Luke 22:27; 1 Thessalonians 2:7; with the article after en, e.g., Matthew 14:6, RV, "in the midst," AV, "before;"
(d) eis m., Mark 14:60, "in the midst;" with the article, e.g., Mark 3:3, "forth" (lit., "into the midst");
(e) ek m., "out of the way," lit., "out of the midst," Colossians 2:14; 2 Thessalonians 2:7, where, however, removal is not necessarily in view; there is no accompanying verb signifying removal, as in each of the other occurrences of the phrases; with the article, e.g., 1 Corinthians 5:2; 2 Corinthians 6:17; See WAY;
(f) kata m., Acts 27:27, "about mid(night)."
(2) The neuter, meson, is used adverbially in Matthew 14:24, in some mss., "in the midst (of the waves);" in Philippians 2:15 in the best mss. (where some mss. have en m. ...).
(3) For Revelation 8:13, See HEAVEN, A, No. 2.
[ B-1,Verb,G3322, mesoo ]
"to be in the middle," is used of time in John 7:14, translated "when it was ... the midst (of the feast)," lit., "(the feast) being in the middle."