Unshaped

Clay,

Yes that is called clay

 Until it is not got mold any shape

The moment it has molded 

Known as the name of that molded shape

Somewhat like The soul when it's got a new body

Named as that person.

It's easy 

To shape the unshaped

But after getting shape

It's far difficult to change shape or mold 

To any other shape.

So it's the very basic or purest form

To remain unshaped.