...[N]ature generally in the distribution of her capacities has adapted the means to the end... [so nature's] true destination must be to produce a will, not merely good as a means to something else, but good in itself, for which reason was... imparted to us as a practical... absolutely necessary... faculty.
Immanuel Kant, Fundamental Principles of the Metaphysic of Morals
morality, nature, reason