Abstract concepts are ideas that cannot be directly observed or measured. They represent qualities or ideas such as love, freedom, or justice. Unlike concrete objects, which can be seen and touched, abstract concepts exist in our thoughts and feelings, making them more subjective and open to interpretation. These concepts often serve as the foundation for human understanding and communication. They help us discuss complex ideas and emotions, allowing us to connect with others on a deeper level. For example, when we talk about happiness, we share our experiences and perspectives, enriching our conversations and relationships.