there are in humanity capacities of greater perfection, which belong
to the end that nature has in view in regard to humanity in
ourselves as the subject: to neglect these might perhaps be consistent
with the maintenance of humanity as an end in itself, but not with the
advancement of this end.

Fourthly, as regards meritorious duties towards others: The
natural end which all men have is their own happiness. Now humanity
might indeed subsist, although no one should contribute anything to
the happiness of others, provided he did not intentionally withdraw
anything from it; but after all this would only harmonize negatively
not positively with humanity as an end in itself, if every one does
not also endeavour, as far as in him lies, to forward the ends of
others. For the ends of any subject which is an end in himself ought
as far as possible to be my ends also, if that conception is to have
its full effect with me.

This principle, that humanity and generally every rational nature is
an end in itself (which is the supreme limiting condition of every
man's freedom of action), is not borrowed from experience, firstly,
because it is universal, applying as it does to all rational beings
whatever, and experience is not capable of determining anything
about them; secondly, because it does not present humanity as an end
to men (subjectively), that is as an object which men do of themselves
actually adopt as an end; but as an objective end, which must as a law
constitute the supreme limiting condition of all our subjective
ends, let them be what we will; it must therefore spring from pure
reason. In fact the objective principle of all practical legislation
lies (according to the first principle) in the rule and its form of
universality which makes it capable of being a law (say, e. g., a