The Metaphysical Elements of Ethics
1780 THE METAPHYSICAL ELEMENTS OF ETHICS by Immanuel Kant translated by Thomas Kingsmill Abbott PREFACE If there exists on any subject a philosophy (that is, a system of rational knowledge based on concepts), then there must also be for this philosophy a system of pure rational concepts, independent of any condition of intuition, in other words, a metaphysic. It may be asked whether metaphysical elements are required also for every practical philosophy, which is the doctrine of duties, and therefore also for Ethics, in order to be able to present it as a true science (systematically), not merely as an aggregate of separate doctrines (fragmentarily). As regards pure jurisprudence, no one will question this requirement; for it concerns only what is formal in the
history of man rather than that of animals; the latter is confined
to an excursion along the sea-board, where there would be, no
doubt, a rich harvest for science, but much less for philosophy.
However that may be, your father and mother, while they grieve for
the day that will separate them from their oldest son, will offer
no obstacles to his projects, but pray God to bless them. . .
The subjoined letter of about the same date from Alexander Braun to
his father tells us how the projects so ardently urged upon his
parents by Agassiz, and so affectionately accepted by them, first
took form in the minds of the friends.
BRAUN TO HIS FATHER.
MUNICH, February 15, 1829.
. . .Last Thursday we were at Oken's. There was interesting talk on
all sorts of subjects, bringing us gradually to the Ural and then
to Humboldt's journey, and finally Oken asked if we would not like
to go with Humboldt. To this we gave warm assent, and told him that
if he could bring it about we would be ready to start at a day's
notice, and Agassiz added, eagerly, "Yes,--and if there were any
hope that he would take us, a word from you would have more weight
than anything." Oken's answer gave us but cold comfort;
nevertheless, he promised to write at once to Humboldt in our
behalf. With this, we went home in great glee; it was very late and
1780 THE METAPHYSICAL ELEMENTS OF ETHICS by Immanuel Kant translated by Thomas Kingsmill Abbott PREFACE If there exists on any subject a philosophy (that is, a system of rational knowledge based on concepts), then there must also be for this philosophy a system of pure rational concepts, independent of any condition of intuition, in other words, a metaphysic. It may be asked whether metaphysical elements are required also for every practical philosophy, which is the doctrine of duties, and therefore also for Ethics, in order to be able to present it as a true science (systematically), not merely as an aggregate of separate doctrines (fragmentarily). As regards pure jurisprudence, no one will question this requirement; for it concerns only what is formal in the