Final answer:
Rahner defines being human as having the capacity for self-transcendence and an innate desire for God. He builds upon Aquinas' understanding of the human person by emphasizing the importance of reason and the spiritual aspect of humanity.
Step-by-step explanation:
According to Rahner, being human means having the capacity for self-transcendence. He believes that humans have an innate desire for God and are oriented towards the infinite. Rahner appropriates Aquinas' understanding of the human person by building upon Aquinas' concept of the soul and the importance of reason. Rahner emphasizes that humans are not just rational beings, but also spiritual beings with a longing for transcendence.