In A Plea for Captain John Brown, Thoreau writes:
Treason! Where does such treason take its rise? I cannot help thinking of you as you deserve, ye governments. Can you dry up the fountains of thought? High treason, when it is resistance to tyranny here below, has its origin in, and is first committed by, the power that makes and forever recreates man. When you have caught and hung all these human rebels, you have accomplished nothing but your own guilt, for you have not struck at the fountain head. You presume to contend with a foe against whom West Point cadets and rifled cannon point not. Can all the art of the cannon-founder tempt matter to turn against its maker? Is the form in which the founder thinks he casts it more essential than the constitution of it and of himself?
Of what matter does Thoreau speak here? Does the author compare the cannon-founder, their art of casting cannons, the form and the constitution of their casts to anything?