While Living in the Material World?

Well, first of all the answer is it means to be in the material world. If you area spiritual being and you are incarnate, in a body, you came here with a plan. You came here with something to do-- something to accomplish. And so, that you have chosen on the "soul" level to incarnate, to be in a body in the first place, is a great spiritual act of helping others.

So the first thing that you must know is that choosing to be incarnate, choosing to be born in the first place is already an act of being a spiritual person.