the fellow is called sign talking eagle who wrote the book. as a boy he lived by the sioux reservation.
i dip in and read that the deaf sign for think touches the forehead, where indian thinking is done with the heart.

what if the colonizers thought with their heart? they might think maybe we should live like the natives do, with nature. they might think, let's have a heart, all of us might live together. they might think, hey, maybe we don't have to kill everything here to make our own heartless place. 
think with the head you are in a world of trouble.
think with the heart you are in a world of hurt, and love.
that's the real difference, if obomba, if t-rump, could think with heart, imagine.