The Second Epistle to the Thessalonians is a book from the New Testament of the Christian Bible. It is traditionally attributed to Paul the Apostle, with Timothy as a co-author. Modern biblical scholarship is divided on whether the epistle was written by Paul; some scholars believe Paul wrote this epistle, but others reject its authenticity based on what they see as differences in style and theology between this and the First Epistle to the Thessalonians. Scholars who support its authenticity view it as having been written around 51–52 AD, shortly after the First Epistle. Those who see it as a later composition assign a date of around 80–115 AD. The original text was written in Koine Greek. Composition The authenticity of this epistle is still in widespread dispute. As Professor Ernest Best, New Testament scholar, explains the problem: The structures of the two letters (to which Best refers) include opening greetings (1 Thessalonians 1:1a, 2 Thessalonians 1:1–2) and closing benedictions (1 Thessalonians 5:28, 2 Thessalonians 3:16d–18) which frame two, balancing, sections (AA'). In 2 Thessalonians these begin with similar successions of nine Greek words, at 1:3 and 2:13. The opening letter section (1:3–2:12) itself comprises two halves, 1:3–12 (where the introductory piece, A, is 1:3–5; the first development, B, is 1:6–10; and the paralleling and concluding development, B', is 1:11–12) and 2:1–12 (with pieces: A 2:1–4, B 2:5–7, B' 2:8–12). The second, balancing, letter section (2:13–3:16c) also comprises two halves: 2:13–3:5 (with pieces: A 2:13–14, B 2:15–17, B' 3:1–5) and 3:6–16c (with pieces: A 3:6–9, B 3:10–12, B' 3:13-16c). Of the twelve pieces in 2 Thessalonians, seven begin with 'brother' introductions. Of the eighteen pieces in 1 Thessalonians, fourteen begin with 'brother' introductions. In both letters, the sections balance in size and focus, and in many details. In 2 Thessalonians, in 2:5 and 3:10, for example, there is a structural balance of the use of "when I was with you..." and "when we were with you...". Support for authenticity One piece of evidence for the authenticity of the epistle is that it was included in Marcion's canon and the Muratorian fragment. It was also mentioned by name by Irenaeus, and quoted by Ignatius, Justin, and Polycarp. G. Milligan argued that a church which possessed an authentic letter of Paul would be unlikely to accept a fake addressed to them. This argument was similarly supported by Colin Nicholl, who has put