Mishnah Berurah — משנה ברורה

The Righteous - Meaning, he should constantly envision in his mind how he is standing before Hashem Blessed be He, because The Holy One's glory fills all the land. And it is written in the name of the Arizal, that he should constantly envision the Name YHV'H before his eyes with the vowelization of the word "Yir'ah" ("Fear"), and this is the secret of "I shall set the Lord before me always" and this greatly benefits one's Fear of Heaven. There are those who were accustomed because of this, to have parchments with a Menorah drawn on it to place in their prayer books, and they write on it "I shall set the Lord..." Etc..., [spelled out] with the Four Letters and other Names, and this Menorah is called "I have set" ["Shiviti"]. And the purpose [of this] is so that it should be remembered not to speak in idle chatter during prayer -out of Fear of God. And it is written in the Gates of Repentance [Sha'arei Teshuvah] in the name of the Tevuas Shor, "It is proper to set out with force to abolish this custom[of writing this parchment of Divine Names] because in general they (the people) don't protect this parchment properly, and they "are spilled at the head of every street" (Lamentations 4:1), and also many times it (the parchment) comes to erasure of The [Divine] Name. And it seems that the large Menorahs which are drawn on parchment and are affixed in the Shul in front of the podium [of the Chazzan/Prayer Leader] under a surface of glass - this is not subject to the reasoning which was mentioned previously, and there is no issue with that" - end quote. [However,] those who affix [parchments] in [front of] the podium without a surface, there is [grounds] to protest against them, because due to the candles which are [customarily] affixed on the podium (hence being under the parchment melting the ink with the heat of the candle), after many times [of lighting these candles], it will lead to erasure of The [Divine] Name, Heaven Forbid.