But, dismissing this method for the reasons discussed above, in the Second Part, the investigation proposed by the Royal Society appears to me now completed. For their question, as it stands, deals only with the foundation of Ethics; as to a possible metaphysical explanation of this foundation nothing whatever is asked. Nevertheless, at the point we have reached, I am very sensible that the human spirit can find no abiding satisfaction, no real repose. As in all branches of practical research, so also in Ethical Science, when all is said, man is inevitably confronted with an ultimate phaenomenon, which while it renders an account of everything that it includes, and everything deducible from it, remains itself an unexplained riddle. So that here, as elsewhere, the want is felt of a final interpretation (which, obviously, cannot but be metaphysical)