In the foregoing analysis the moral law led to a practical problem
which is prescribed by pure reason alone, without the aid of any
sensible motives, namely, that of the necessary completeness of the
first and element of the summum bonum, viz.
which is prescribed by pure reason alone, without the aid of any
sensible motives, namely, that of the necessary completeness of the
first and element of the summum bonum, viz.
Kant - Critique of Practical Reason