How do you define what a person is?

A person is not a what but a who. A person is nothing but a sack of meat. A personality is what defines that sack of meat. The personality that sets us apart from each other. Making us differenet from robots and machines. That personality will make that sack of meat feel and think and thoses thoughts a person has will influence thier actions. Which impacts the world so that others can see "what" kind of person they are.