The Hand is that which human beings think with. It is their hands that provide the answer of curiosity, that feel and pinch and turn and lift and heft. There are animals that have brains of respectable size, but they have no hands and that makes all the difference.
The Hand is unique to the human. Apes too have organs that can grasp, but they do not have hands... hands reach, and extend, receive and welcome.
13 concepts in this pillow book.