The ability of flying is something that does not come natural to human kind, and even though we managed to achieve it through artificial means, it only manages to serve an artificial purpose. We will never get to truly experience how the wind feels while lifting us into the ether, or how it is to have no constraints of freedom and have the thread of infinite in our hands. So all we are left with, is to try and feel all of this through the only beings for which all of this comes naturally - the birds.