Plato describes "The Form of the Good" in his book, The Republic, using Socrates as his mouth piece. The Form of the Good is the ideal or perfect nature of goodness, and so an absolute measure of justice. Plato also explains his theory of justice in The Republic, in relation to his conception of the ideal state, both of which necessitate rule of the rational mind; in other words, philosopher-kings, who can grasp the Form of the Good. Plato Plato (Greek: Πλάτων, Plátōn) (c. ... The Republic is an influential dialogue by Plato, written in the first half of the 4th century BC. This Socratic dialogue mainly is about political philosophy and ethics. ... This article is about the ancient Greek philosopher, for all other uses see: Socrates (disambiguation) Socrates ca. ... Platonic realism is a metaphysical theory of universals, maintaining that universals exist in a realm that is separate from space and time. ... Lady Justice - allegory of Justice as woman with sword and with book - statue at court building. ... Rationalism, also known as the rationalist movement, is a philosophical doctrine that asserts that the truth can best be discovered by reason and factual analysis, rather than faith, dogma or religious teaching. ... To meet Wikipedias quality standards and appeal to a wider international audience, this article may require cleanup. ... This article is about the band. ...

He poetically compares the Form of the Good to the sun. He says that just as the sun emanates light, so the form of the good emanates truth. And just as we are able to see the world with our eyes using the light of the sun, so we can make sense of the world with our rational minds only through the assistance of truth, derived from the Form of the Good. The Sun is the spectral type G2V yellow star at the center of Earths solar system. ... Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength. ... There is no single definition of truth that is not also controversial; rather there are various complementary or contrary definitions. ...

Plato said that the highest form of knowledge is the form of the good, from which things that are just gain their usefulness and value. Humans have a duty to pursue the good, but no one can hope to do this successfully without philosophical reasoning.

From goodness is something called the "Hierachy of Forms". This suggests that from goodness comes such things as justice, truth, equality and beauty, among many others. There are abstract ideas, for example horse, chair and tree. Beneath this are the maths and sciences, which train us to understand the abstract ideas. At the very bottom are the material objects - the opinions based on perception.

See also Theory of forms. It has been suggested that The Forms be merged into this article or section. ...