EXOD352 Belief in Hashem's existence. One must believe that the universe has only one God, that everything that exists, existed and will exist in all of Creation is His doing and results from His will. This one God took our nation out of Egypt and gave us His Torah. Do not let your heart entice you into thinking that our liberation from Egyptian enslavement and the plagues suffered by Egypt occurred by chance. One must know that Hashem redeemed us from Egypt. It was His Will and His doing, and every detail of it was under His supervision. He brought it about, as He had promised to our forefathers, Avraham, Yitzchak, and Yaakov. It is obvious to all that this principle is the focal point of the Jewish faith. Anyone who denies this principle denies all of Judaism and is not considered a part of the Jewish People. Every Jew must enter these basic beliefs into his or her consciousness, and there must be no doubt about these principles at all. When a Jew is asked about his/her religious beliefs, he/she must immediately respond that these are his/her beliefs. Never would he/she exchange these beliefs for any others, even if threatened with death. We fulfill this mitzvah in the optimal fashion when we understand in our hearts and see with our eyes that these beliefs are indisputably true and it is impossible to believe otherwise. This mitzvah is one of the six constant mitzvos, for we must be conscious of this basic belief at all times, every minute of the day and for all of our lives (See Introduction to Sefer HaChinuch, cited in the Mishnah Berurah, Siman 1, in the Biur Halachah, s.v. Hu Klal).