Abstract
The first part of the article contains a logical reconstruction and a methodological analysis of some aspects of the famous Władysław Witiwcki’s work “Faith of Enlightened”. In particular, the classifications of believers and the principles of these classifications are analyzed; methodological errors committed by Witwicki are indicated. In the second part of the text, Witwicki's distinctions are illustrated by attitudes towards God and faith represented by four representatives of the Lvov-Warsaw School: Kazimierz Twardowski, Jan Łukasiewicz, Tadeusz Kotarbiński, and Józef Maria Bocheński.