In a room, watching the sunset, you are breathing.
You turn from the window, opening the desk drawer. From the drawer you take out cleaner and oil and set it on the left hand corner of the desk. You close the drawer and remove the gun from the holster. In thirty seconds the gun is neatly set out before you in pieces, it takes a half hour to clean and oil each piece thoroughly.
There is little light left on the horizon.
You reassemble this gun, put in its proper place.
You disassemble another gun, doing the same to it as the previous. This is this gun, not that gun, the one before, but a gun all the same, that needs to be cleaned and oiled, in the same manner that any gun must be, to work properly, to function.
You repeat this until you are done with all the guns that you have and you are ready to work.