Common

Community's a very funny thing:
It self-defines, and cannot be defined;
It takes the best from all that all can bring
As if by angels it had been designed
And yet the worst from all is also brought
And taken in, and then outward expressed;
It takes the average too of human thought
And all and none at once of interest.
The common the low, the base, the weak
And yet the height of sense is called the same;
Without community all life is bleak
And yet it can exist without the name.
It can't be held, and yet it can embrace
Cannot be seen, and yet we are its face.