Read it through once

“The law doth not permit a child to make or meddle in any weighty matter, good my liege, holding that its callow wit unfitteth it to cope with the riper wit and evil schemings of them that are its elders. The _Devil_ may buy a child, if he so choose, and the child agree thereto, but not an Englishman--in this latter case the contract would be null and void.”