Discover your Character" by Fr.Marcelino Garcia,S.J. is the exposition of the character theory of Rene Le Senne. Rene Le Senne was a French philosopher. It is the first time that the theory and its application together with its test of character appear in the tongue of Shakespeare, in English. First the theory and the test were published in French. One can claim that there is not a hard work of confirmation with reality for this theory. But his author, Rene Le Senne had the care of including some important bibliography of scientific confirmation for the theory and its application. It is the famous theory of presenting character in 8 different types: Choleric, Sanguine, Sentimental, Phlegmatic, Passionate, Nervous, Amorphous and Apathetic. Le Senne based his studies in the work realized by two psychologists and psyquiatrists known by the names of Heymans and Wiersman, professors of the University of Groningen. They were the first who created the original theory and validated the character test. Le Senne writes his book in 1943 "Tratado del Caracter". This theory was not presented first in English because the word and the concept of character is assumed in English by the word and the concept of Personality. After you have corrected the test and discover your character formula in the book ,you can search for the type of character that you are, your general characteristics, your positive and negative aspects of your personality and some suggestions for bettering your way of being. Taking in consideration all the critique that this theory has faced, you will check with your reality and will discover that the affirmations and characteristics given by the test are describing very closely into what you feel that you are, into what character type you feel you belong.