One of the modern sciences that has gained far-reaching fame and great value, and has become important in life and has a distinguished place among the sciences is psychology. It is modern because it has not been freed from the shackles of philosophy, which was a burden upon it and a branch of it, acquiring a purely scientific hue and a positive cloak that made us write it down among the sciences like physics and chemistry... until recently. It is a science that investigates the psychological life of man, and thus we find it related to everything man does. There is nothing dearer to man and more deserving of his attention than the study of himself, and from here arose its importance and the urgent need to learn it. Since psychology is the science that investigates your soul and teaches you who you are, you will undoubtedly wonder how you do not know yourself, which is the thing most connected to you. You will be even more amazed at how someone else can pave the way for this knowledge for you, while you know yourself best!