This volume looks carefully at the peculiar Johannine usage of the noun hilasmos in 1 John 2:2 and 4:10. Outside of 1 John, hilasmos is not used elsewhere in the NT. Moreover, other issues in and around the immediate contexts of the hilasmos-concept in 1 John have not been the subject of thorough discussion among NT scholars. As a result, many important issues in 1 John often stand in the shadow of the Fourth Gospel, and thus have been neglected and become secondary to those in the Gospel. Precisely, 1 John 2:1-2 and 4:7-10 have hitherto received neither close attention nor an in-depth study. To shed some light onto the shadow under the umbrella of the Johannine literature, this study will undertake an exegetical investigation of 1 John 2:1-2 and 4:7-10.