The human person is both an embodied spirit and a rational being with self-awareness and free will. As embodied spirits, humans have both a physical body and a non-physical spirit or soul that allows for things like thought, emotion, and will. The body and spirit are united and integrated in a person. Key traits that define humans as persons include self-awareness, rational thought, free will, dignity, and the ability to interact with others and the external world. Humans are able to transcend physical limits through imagination, reflection, and will.