The aim of the paper is to present and critically evaluate Tadeusz Czeżowski's views concerning knowledge and belief in the context of some non-Brentanian epistemological concepts and theories. Czeżowski belonged to the most eminent representatives of the Lvov-Warsaw School, which was generally under a strong and many-sided influence of Franz Brentano's philosophy. Czeżowski himself was a disciple of Kazimierz Twardowski, the founder of the Lvov-Warsaw School and one of the most prominent of Brentano's students. That is why contemporary discussions about the philosophy of the Lvov-Warsaw School, and about Czeżowski's philosophy in particular, are often set against Brentanian ideas. However, I would like to consider Czeżowski's epistemology in a historical context which is broader than the Brentanian philosophy only. In fact, it is a context to which also the latter belongs; I mean the epistemological doctrines of Descartes, Locke, Hume, Reid and the contemporary views which refer to them.