Jesus answered him, "Are you the teacher of Israel, and don't understand these things?

 Take the case of carrying a burden. Jeremiah 17:21-24 said: "Take heed for the sake of your lives and do not bear a burden on the Sabbath day." So a burden had to be defined. It was defined as "food equal in weight to a dried fig, enough wine for mixing in a goblet, milk enough for one swallow, honey enough to put upon a wound, oil enough to anoint a small member, water enough to moisten an eye-salve," and so on and on. It had then to be settled whether or not on the Sabbath a woman could wear a brooch, a man could wear a wooden leg or dentures; or would it be carrying a burden to do so? Could a chair or even a child be lifted? And so on and on the discussions and the regulations went. 