The form of the express duty if in some formularizations, in the categorical imperative call, which has this name for being a formal order never based in hypotheses or conditions. Thus, it would be to want to start, to each time, everything of new, would be to assume in itself a moral conscience so pure and rational that nor exists, and it would be to strengthen the individualism. Contact information is here: McRib. If it cannot ignore the history and the ethical traditions of a people. Plato (427-347 B.C.) part of the idea of that all the men search the happiness, that is, Sumo Well. It waited the happiness mainly stops after the death.
The men would have to look for during this life, the contemplation of the ideas, as he has a species of Being and the Good. From this Well superior one, the man must look for to discover a good scale, helps that it to arrive at the absolute one. Dialectic and virtue must walk together, therefore the dialectic is the way of the contemplation of the ideas and the virtue is this adequacy of the personal life to the supreme ideas, also is a purificao, where the man learns to get loose itself of the world of contemplating the ideal world here and now, invariant and perpetual. There it is Sumo Well. The ideal searched for the virtuous man is the imitation or assimilation of God.
The norm of the virtue is the proper idea of the Good, an idea perfect and subsistent. Plato says that the main virtues are justice, prudence, wisdom, ortaleza, value and moderation. Aristotle also part of the correlation between the Being and the Good. insists on the variety of the beings, and from there it concludes that the goods also must necessarily vary, therefore each being must have a good. Aristotle knows that the man does not need only optimum the goods, but yes of some goods.