The question "What can I know?" is a central philosophical inquiry famously explored by Immanuel Kant. Kant argued that we cannot know the world as it truly is in itself; instead, our knowledge is shaped by how our mind structures our experiences. We receive raw sensory data, but our mind filters and organizes this data through innate frameworks of time, space, and categories of understanding, allowing us to form concepts and judgments about the world. Thus, knowledge arises from a combination of sensory input and the mind's active processing. At the same time, Kant acknowledged limits to what we can know. Questions about the infinite, the cosmos, God, and similar metaphysical topics go beyond the reach of our understanding and are ultimately unknowable with certainty. More broadly, in philosophy, knowledge has traditionally been defined as "justified true belief," meaning that for someone to know something, they must believe it, it must be true, and they have justification for that belief. However, this definition is debated and may not fully capture the nature of knowledge. In sum, what one can know is constrained by the ways the mind structures experience, by the reliability of justifications for beliefs, and by the inherent limits of human reason and perception.
