Versatility, Virtue, Reward

Perhaps the least studied of Kant's four Duties is the 'imperfect Duty to oneself'. However, this one might be the most significant of them.  His example is 'one should not let one's talents rust', or, conversely, 'one should cultivate one's powers'.  But, a power is Know-How, so, this Duty promotes Technical Reason, the same faculty that devises the Means-End relation that constitutes a Maxim.  Furthermore, the principle that requires it is Universal, and, so, is applicable to all Humans, but questionably to any incorporeal of the inhabitants of his Rational Kingdom.  Hence, the Duty is equivalent to the promotion of the Versatility of the Human Species, i. e. equivalent to its Evolvement, as has been previously discussed.  Now, many find satisfaction in the cultivation of their talents, and the fulfillment of a Duty in Kant's doctrine is a Virtue.  Thus, at the heart of the doctrine is an example of a self-rewarding Rational Virtue that obviates the purported Necessity of a deity that rewards Virtue, and, hence, a moment therein that anticipates the threat of Evolutionism to traditional Theology.