artistic sentiment and experience. At the start of the text, Deri introduces core concepts such as observation and theory, rooted in the ideas of Ernst Mach. He lays out a framework for understanding how human consciousness interacts with the external world and how this interaction influences artistic creation. The opening explores the distinctions between different aesthetic experiences, emphasizing the importance of isolating emotional responses to art from intellectual analysis. This sets the stage for a deeper exploration of how different styles—such as naturalism's emphasis on accurate representation of nature and expressionism's focus on intensified emotion—serve as pathways for artists to communicate their inner experiences through their works. (This is an automatically generated summary.)