Vishnu sahasranamam, sloka15

Sloka15:       Lokadhyakshaha Suraadhyaksho Dharmaadhyakshaha  kruthaakruthaha
                    Chaturaatma  chaturvyuhaha  chaturDamstraha  chathurbhujaha

The commander of the universe,  the commander of devatas, the commander of righteousness,   the done, to be done deeds of past and future, the strategic Devine  field Atma,which is well patterned, the  four cornered,  the four directioned  Supreme Self is Sree Maha Vishnu.
  

Vishnu is  the commander, the lord of entire universe.
Vishnu is the field of absolute Intelligence, well designed in all four directions and  four corners.

            Here, in this slok, the words like "Damstra and Bhuja" won't refer physicaly to any human parts. These words refer to different directions in which the "Vishnu Kshetra" expanded.

                  Om Vishnave namahauj