Lorenzo Valla is the largest ethical thinker of the Renaissance, who understood biblical and ancient ethics in the key of updated logic. Valla created a dynamic ethic that anticipated the enterprise of modern times. The ability to select precise arguments, elegance of style, convincing comparison of different points of view makes Valla's works a school of ethical philosophy. The discussions started by Walla about free will, about the nature of desires, about the intentions of the will and now create a framework for philosophical understanding of our everyday life.