Against the consensus that ‘peace and security’ in 1 Thess 5.3 is an allusion to a common Roman imperial slogan, it is argued that, while ‘peace’ does, in fact, evoke Roman propaganda's promise of a stable society to her loyal subjects, ‘security’ has its roots in the Hellenistic conception of the polis as the guarantor of stability. Paul himself combined these two catchwords, thereby promoting a counterclaim both to Roman imperial power and to Hellenistic visions of the ideal civic society. Neither can offer true security in the face of the apocalyptic cataclysm he is convinced is coming. That can be found, as far as he is concerned, only in identifying with the community of believers in Jesus.