"Even if there never have been actions arising from such pure sources,
what is at issue here is not whether this or that happened; that,
instead, reason by itself and independently of all appearances commands
what ought to happen; that, accordingly, actions of which the world
has perhaps so far given no example, and whose very practicability might
be very much doubted by one who bases everything on experience, are
still inflexibly commanded by reason ... because ... duty ... lies,
prior to all experience, in the idea of a reason determining the will by
means of apriori grounds."
-Immanuel Kant, Groundwork of the metaphysics of morals, 1785


