Plato wrote on various philosophical topics, mainly those dealing with ethics, politics, metaphysics and epistemology. Where he considers that each individual should occupy the place that corresponds to him. The grouping of Plato's most recognized works has been called Dialogues, given the dramatic organization of discussion between people involved in a dialogue as its name says. In this case one of his most important works at that time and to this day is the book Republic (Plato) which was published in 370 BC in the Greek language which can be said to be the compilation of the ideas that make up his philosophy and raises the political philosophy of a perfect or exemplary state, as well as discussing the term of what is justice. It begins with the dialogue between Socrates and other characters such as Cephalus, Polemarchus and Thrasymachus. In the case of the last dialogue Plato confirms his assumption that each person should do what he or she knows and nothing more, where if everyone does their job well and fulfills the purpose for which they were created, it would be an ideal city-state or simply a world in complete balance. Plato divides the population generally into classes which are the worker class at the bottom, the warrior class in the middle and the ruler class at the top. As a last point in the writing we can see the context in which it was developed where the theory of the virtues appears and that for a city to be just it had to comply with the reasonableness, courage, temperament, the reflection of justice in a society and how this is manifested in man which is constantly highlighted in the writing as it reinforces and makes necessary the practice of these activities being able to say that justice influences life in such a way that it is the mother of the virtue of order as we know it. Wanting, but at the same time failing in the attempt to create a republic of government led by philosophers.

In this case I chose the book "Metaphysics" which belongs to the genre of treatise and having as original language the ancient Greek, is one of the main works of Aristotle about the branch of philosophy. In this we are presented as a series of treatises that try to discover the deepest truth of things and talk about the first philosophy as the science about the principles, causes and foundations of everything present in the existence itself, about the universal human being, the reality of the essence and the features that characterize it, unlike other sciences that focus on a specific being. Where it investigates what can be concluded about a being in the way it is and not necessarily to the special attributes it possesses.

Initially, in the case of Aristotle, metaphysics means and has a context beyond the material or physical and is a branch of philosophy that studies the most concurrent problems of philosophical thought, the first possible causes of reality, in terms of everything that exists, as well as its main purpose, nature, time, space, mind, being and nothingness, the principles of the intangible of being such as the soul and its corresponding essence. Just as it is based on the fact that everything is a form of pure matter, just as it seeks the origin of mathematical elements and a god. This theory influences the present, for example, can be seen, in the presence of everyday situations and in moral dilemmas where it is possible to analyze what to do or how to act appropriately in the face of a difficulty, metaphysics can also be reflected in life when we try to understand life and other people, also when we talk to our conscience mentally, which is also part of metaphysics, with something supernatural, when something strange happens that we do not understand, in the same way it is part of metaphysics, and last but not least, when we try to understand the link between the human being and the vast universe that surrounds us.

As its name indicates, this book has its context from Thales to Democritus and many other philosophers and mathematicians. Although there is no exact record of the original date on which it began to be written as it was passed from person to person over time and different editions can be seen, but there is the 1946 version created in Huelva being translated by Alberto Bernabé and later coined by the Alianza Editorial in its third edition of 2001 and 2006. Continuing with what has already been mentioned, these fragments deal with the fact that wisdom eliminates the evils of the soul, nature and education are related, we must accept that human life is not forever and in the course of life we will be presented with various difficulties for some reason, equality in noble everywhere maintaining a balance between the state and political life, we must supply the satisfaction of the human being with happiness stimulated by thought. As for the way in which the book was influential, Democritus himself and the Presocratic was that they created a uniform group that played an important role in philosophy, providing solutions to the problems that arose from the beginning. In the field of chemistry, it has boosted the evolution of society, helping the development of research into macroscopic physical properties, medicine, the industrial sector, and allows a better understanding of the cosmos and its components. Finally, the theory of the atomic vacuum prevailed in a more detailed explanation as in the case of Isaac Newton's theory of absolute space. 

The Letter to Meneceus is the most famous writing of the Greek Epicurus originally written around the fourth century BC, among the pages that this letter contains the philosopher raises the main themes of his philosophy in relation to ethics, metaphysics, the meaning and pursuit of happiness, the etymology and nature of the gods, the fear of death, and the distribution of pleasures. It also highlights why it is necessary to philosophize to take care of the soul and be happy in certain aspects when we are young and in old age, therefore, we must study the ways to achieve happiness in a stage of life because when we lack it, we practically have everything, and when we do not have it, we do anything to achieve it. Therefore, it is good to meditate, take your own personal space, and think that life is beautiful. It is also necessary to understand that God is an eternal and blissful living being, be familiar with the fact that death does not represent anything bad for the human being, since good and evil only exist in the perception that our brain and senses create, and death is the absence of this perception. On the other hand, it is necessary to know that desires are divided between natural and superficial desires, the necessary desires serve to obtain happiness, others for serenity, and others for life itself. For this reason, pleasure and wisdom can be said to be the beginning and the end of the happy life through mental and bodily tranquility, which is known as ataraxia. Epicurus showed us that to reach the point of balance and happiness can be achieved even through devotion or good pain management. The lessons he left behind began to become more recognized by people in the 15th century, but in the 17th century these ideas were officially admitted. The influence this left was mostly in the period during and after the enlightenment contributing to the ideas of intellectuals like Thomas Jefferson, Karl Marx, John Locke etc. 

This work was divided into three parts of discourses which were one on cosmology, one on politics/ethics, and the other on theology, but later they were distributed separately, as in short narratives and references, in quotations, and in illustrations of other authors. The philosopher Diogenes claims that Heraclitus first wrote his book on papyrus. These fragments separately offer a very complete knowledge having a form to such a degree that it seems to be said by a divine being. Likewise, the assumption was created that perhaps Heraclitus did not write any book as such, but that all the lessons he taught were given orally but not in writing, where his continuators dedicated themselves to group the most important information. The works of Heraclitus in general are considered as aphoristic, where everything that is manifested there tries to have a concrete and congruent principle. Thus, coming from the Ionian Greek philosophical school. In other works of Heraclitus, he was quite meticulous about the religious rites that took place in those years. He also said that fire made everything possible, and that everything is subject to a beginning and therefore to an end. To conclude Heraclitus was remembered by civilization as a true pioneer of all this science, since he was the first to propose the constant change of nature where he wanted to explain that everything in this vast universe and the human mind is always exposed to change depending on the circumstance. The discipline of Logos was coined by the Stoics and Nietzsche came to admire Heraclitus.