whatsoever, it results that Ethic needs no material determinator of choice, i. e. requires no ulterior end, either to recognise what is duty, or to excite toward its execution, but, on the contrary, can and ought, in a question regarding duty, to abstract from all ends whatsoever. To take an instance, suppose I wish to know, if I SHOULD (or can) speak truth in the witness-box, or re-deliver a deposite intrusted to my care, then I require to make no inquiry concerning any end or purpose which my evidence