The chapter focuses on affective factors as determinants of subjective and intersubjective knowledge, which finds its manifestation in texts as products of the semiotic activity of humans. A constructivist perspective allows an understanding of knowledge in its individual and social dimensions on the assumption that emotions and feelings, respectively governed or shaped by language and culture, impact human cognition and behavior. As is reasoned about the semiotic nature of cognitive processes, human individuals experience the world through the systems of their personal constructs, that is, personal conceptions about the world and its functioning they create to make sense of it. Separately, what is shown by referring to the concept of socially constructed knowledge is, first, how the individual is introduced, due to the roles played, to specific domains of socially objectified knowledge, not exclusively in the narrower sense but also the knowledge of norms, and values and, second, how the self and identity of the individual (personal distinctiveness) grow and persist through their emotional identification with the significant others. In the course of the argumentation, it is established that personal knowledge, the consequence of human activity as being-in-the-world, a kind of cognitive involvement, is featured by the blurring of the difference between beliefs and facts.