Briefly summarize the philosophies of Socrates Plato and Aristotle?

This is a famous phrase, this phrase summarize Socrates' philosophy as well as any few Words can. My translation is different from the traditional one because the Greek does not only means that you should submit your own life to examination but also examining the lives of others counts too - and it is that Socrates spends most of his time doing. Examining someone else's life and also reflect on your own life, because our lives have more in common than not. For Socrates does not means that any examined life is of equal value, that you can live however you choose, so long as you think through what you are doing. In addition, Socrates maybe also means that if there is no examination, no opinion and we cannot do what we want. So, our life is meaningless