Discussion regarding the use and nature of the term “truth” in John’s (Corpus Johanneum) has a long record going back to the XIX century. Scholars of such a calibre as were Dodd or Bultmann drew their attention to Hellenic circles (including Platonic and Gnostic) as the main source of inspiration for John’s interpretation of truth. However, over the course of time, we have noticed a turn towards enhancement of literature of Judaism of that time, including texts from Qumran. After discussing status questionis lexeme alētheia was analysed in the texts of Corpus Johanneum.Conclusions resulting from the analysis lead to the view focusing on non-homogeneous influences and also on a considerable contribution of John’s own circles and that of the early Church.