Baur and a part of his school (Volkmar, Holsten) denied the authenticity of this Epistle because it is lacking in originality and significant doctrinal ideas; it is dependent upon other NT writings; it contains nothing about justification by faith, no polemic against Judaizing teaching about the Law, and no OT quotations; finally, the apocalypticism in chaps. 4 and 5 is non-Pauline. The alleged literary parallels, however, do not exist, and in Thessalnica the battle against the Judaizers about justification by faith played no role. In vocabulary, style, and direction of thought the Epistle is genuinely Pauline. No later writer would have attributed to Paul the unfulfilled expectation of living to see the parousia (4:15, 17). There is no reason for denying to paul the apocalyptic thoughts of the Epistle-they are also found in I Cor. 15:23 ff., 51 ff...The additional supposition that the sections 2:13-16; 4:1-8, 10b-12, 18; 5:12-22, 27 are un-Pauline additions of the redactor (Eckart) runs aground on the incontestably Pauline language of these sections, and also on the fact that nothing convincing can be adduced against these texts. There can be no justifiable doubt that all of I Thessalonians is of Pauline origin.