If you believe yourself to be a thing (a noun), you limit yourself to your physical body and reality. The physical you (or me) can see, smell, taste, touch and hear, but it can't experience emotions, take action or come up with new ideas. The inactive noun perspective of life leaves out all the pleasure, pain and activity that make us human.
Following Bucky's wisdom, all people are verbs, and these days most people are like Bucky, very active verbs. We're doing a lot, and we're continuing to be more than our ancestors ever imagined possible. We're in the process of continually evolving and doing our best to make ourselves better in every way.
We do, however, need to remember that we are each here for a purpose that supports all life and the evolution of our species and our tiny Spaceship Earth. The shift from weaponry to "livingry" that Bucky championed for most of his life is more important than ever, especially as we all begin to truly Occupy Spaceship Earth.