Evident - the word that perhaps succinctly defines how Kant saw the truths of the world around him. The arguments hidden in his writings are not so obvious. While he emphasizes the important, yet confusing nature of reason in his Foundation of the Metaphysics of Morals, he proves his own point of view through his reasoning processes. However, in this work he systematically develops his argument for a universal good, good will, in which inclination, duty and reason play a crucial role. In this essay I will explain Kant's reasoning behind his statement that the only true, unqualified good is good will, and therefore determine whether his idea of ​​the good differs from the Platonic ideal of goodness. In Kant's development of his theory, he relied on the faculty of human reason to demonstrate his hypotheses. He begins by questioning the ultimate goal of human reason. He considers for a moment that man's reason exists to bring happiness, but he quickly cancels this hypothesis by a judgment of common sense: We note that the most cultivated reason devotes itself to the goal of enjoying life and happiness, the further man moves away from true contentment. . . . because after having calculated all the advantages which they derive from it, ... they nevertheless discover that they are in fact only causing them more problems than they have gained in happiness. 1It is therefore clear to Kant that the long-held idea that reason exists to nourish human happiness is fundamentally false. However Kant maintained that there must be a purpose for which reason was placed in man. He comes to the conclusion that although reason influences the will, it is not meant to do so to provide goods outside of its initial influence, "[reason'...... middle of paper ... ...which belongs to me or even to others, but because it cannot be suitable as a principle in a possible universal legislation, Iason demands from me immediate respect for such legislation 11. This means that if a maxim clearly cancels out when applied theoretically at the universal level, the maxim, or theoretical legislation, must be considered in relation to what is good When we consider the Platonic form of goodness, the Kantian idea of ​​good will. is similar in that it adheres to a theoretical universal and reason is essential to its discovery. However, the concept of the Golden Rule is not important to Plato and he would certainly scoff at the exclusivity of the term ". moral.” But at the heart of the comparison is the similarity in the importance of reason, the importance of reason. duty and the idea of ​​a universal.9 Ibid.,953.10 Ibid.11 1bid.