Know Thyself is an ancient Greek aphorism and a very important life maxim because when you know your own inner makeup, you can predict how you will react to certain situations and certain people. You need to know yourself well enough to know how you make decisions. Is it with logic and reason or emotions? If it is with emotions, what is it that triggers them? How can you control this part of yourself? Making decisions based on emotions is like playing blackjack at a casino. There is no certainty that you will win. You are gambling with your reality. Sometimes, it is fun to do this and a part of you accepts that you may lose and you may be okay with that. Other times, when the stakes are high, you need to make decisions with your logical part of the Self and not leave things to chance.