שִׁוִּ֬יתִי יְהוָ֣ה לְנֶגְדִּ֣י תָמִ֑יד כִּ֥י מִֽ֝ימִינִ֗י בַּל־אֶמּֽוֹט׃
Je fixe constamment mes regards sur le Seigneur; s’il est à ma droite, je ne chancellerai pas.
Kitzur Shulchan Arukh
"I have set Hashem before me always."1Psalms 16:8. This is a fundamental rule of the Torah and of the attributes of the righteous who walk before God. For we cannot compare a person's lifestyle, his activities and affairs when he is alone, to his lifestyle, and activities and affairs when he is before a great king. Similarly, his conversation and speech when he is amongst family or relatives, [cannot be compared] to what they would be in the presence of a king, because then he would certainly take special care that all his activities and conversations be refined and correct. How much more so when you contemplate that Hashem, the greatest of kings, the Holy One, blessed is He, Whose glory fills the entire world, stands above you and views your actions, as it is said: "If a person will hide in hidden places will I not see him? Says the word of Hashem, Do I not fill the heavens and the earth!"2Jeremiah 23:24. [Bearing this in mind] it is certain that you will immediately acquire a feeling of reverence and submissiveness for the awesomeness of Hashem, Blessed be He, and be ashamed [to sin] before Him.
Arukh HaShulchan
Therefore G-d found it necessary to create man on the sixth day, and He created him with competing drives: Man possesses a spiritual soul that enables him to recognize the creator as does an angel, as the verse states: “Man’s soul is G-d’s lamp…” (Mishlei 20:27). He also possesses an animalistic nature due to his physical body, which drives him to animal behaviors, such as eating, drinking, and sleeping.This state of affairs gives rise to a constant struggle within man all the days of his life, with his animal nature pining for physical desires, while his pure soul opposes such pursuits, inspiring man to turn to his real purpose, to serve G-d like an angel. His soul further insists that even necessary physical needs, such as eating, drinking, and sleeping, should be done with intent to better serve G-d, and on this the verse has been stated: “I have placed G-d before me constantly.” (Psalms 16:8). After man’s death he is shown on high that all his actions were recorded, as though in a book, with his own signature. If he has followed the path of Torah and mitzvos, he inherits heaven (Lit. 'Gan Eden') which is a limitless and endless spiritual joy. Of these people the verse proclaims "They will be sated from the fat of Your house, and with the stream of Your delights You give them to drink. For with You is the source of life; in Your light we will see light. " (Psalms 36:9). If G-d forbid his actions were the opposite, he inherits Gehenom, to which all the pains of this life are as naught in comparison. On these people the verse states: "And they shall go out and see the corpses of the people who rebelled against Me, for their worm shall not die, and their fire shall not be quenched, and they shall be an abhorring for all flesh." (Yishayahu 66:24). There are seven descriptions given to Gehenom: Nether-world (or Sheol), Destruction, Pit, Tumultuous Pit, Miry Clay, Shadow of Death and the Underworld. (Eruvin 19a). One who is seduced by his base inclinations falls there, and that is why it is also called 'seducer', as the verse states "For Tophteh (Heb. related to the word 'seduce') is set up from yesterday, that too has been prepared for the king (Sennacherib and his army), it deepened, it widened its pile, of fire and much wood; the breath of the Lord is like a stream of brimstone, burning therein.(Yishayahu 30:33). (Eruvin 19a).
Mishneh Torah, Tefillin, Mezuzah and the Torah Scroll
A king has the duty of writing for himself another scroll of the Law, in his capacity as sovereign, in addition to the scroll which he owns in his private capacity, as it is said, "And it shall be, when he sitteth upon the throne of his kingdom, that he shall write him a copy of this law, etc." (Deuteronomy 17:18). This copy is corrected by comparison with a scroll kept in the temple court, and under the authority of the Supreme Judicature. The scroll which the king had possessed when he was a private individual, he places in his archives. The one that he wrote or had written for him when he became king, should always be with him. If he goes to war, the scroll is to be with him. When he enters his home, it is to be with him. When he hears a cause (tries a case) it is to be with him. When he sits down to a meal, it is to be placed before him, as it is said, "And it shall be with him, and he shall read therein all the days of his life" (Deuteronomy 17:19).