This chapter focuses on concepts of truth in sciences, humanities, and religion. The truth may be defined in different ways, depending on whether it is mentioned in the philosophical, scientific, communicative, or religious context. The boundaries of these contexts may be fluid or vague. There may be confusion in the same text, even in the same sentence, especially between factual and revealed truth. In lexicography a faith can be defined as a subjective intuitive belief, unverifiable (by empirical checking, by reason, etc.); or as an absolute confidence in supernatural (being), in its truthfulness, therefore as fidelity (belonging) to it. In order to avoid misunderstandings: when the terms such as “truth” are used in the current dialog between science and religion, and between them and civil society (for example in the media), it should be useful to keep in mind and clearly say which meaning of the term in question is mediated, or at least in which optic: the religious or scientific one. Failure to be clear about the different meanings of truth in science and religion leads to preventable tension and conflict between them.