Since ancient times until today, many thinkers and philo­sophers with their impo­rtant writings responded to the biases, foolishness, recklessness and in human egocentricity, with the most brilliant and powerful thinking. They approached great truths and formulate arguments and set a brake in unilateral and extreme opinions, they emphasized the creativity of human spirit and gave a philo­sophical way of life as example. I feel need to express my admiration and optimism and together my sorrow for those who I couldn't study them until now or it did not happen still.

If somebody is informed about the main thoughts of a philosopher from a summary -in a philosophical dictionary or encyclopedia and some other brief references- unfortunately the reader nothing will understand. Rather, reader will conceive a warped until an irrelevant view of theory which the same philosopher has formulate it thoroughly. Often, we writers -particularly professors that teach the history and subsections of philosophy- perceive selectively thoughts if appertain to popular questions that we consider as staple and firmly questions in Philo­sophy. Perhaps, thinkers and philosophers did not consider these questions so much signifi­cantly and decisive and in first priority. They approached to their thoughts from a peculiar and extra­ordinary thinking and through different experiences even to the most ordinary questions. They formulated their theories with different concerns and not as seem of the final written formulation and completion of their essays. Philosophers have expressed rational thoughts and key-observations, inferences and concepts, which we remove or misquote and differently interpret -selectively in many cases- in order to we summarize and understand their theories.