According to Brentano, what is the relationship between mental acts and their content?

Brentano posited that mental acts and their content are inseparable, which is a central tenet of his psychology. He emphasized that every mental act is directed towards an object or content, which means that you cannot have a mental experience without a corresponding content. For instance, when one has a belief, that belief is inherently tied to the content of what is believed. This inseparability underlines his concept of intentionality, which suggests that mental acts are always about something, reinforcing the idea that mental states cannot exist in isolation without their content. The connection between mental acts and their respective objects illustrates how our thoughts and experiences are fundamentally intertwined with what they represent. This viewpoint had significant implications for the development of psychology, emphasizing the importance of understanding both the nature of mental acts and the content they bear in the study of the mind.