קבלה אויף חבקוק 2:20

His title Lord-Adona”y-אדנ"י is like a warehouse that houses all the King’s treasures and is the great provider for the totality of all creatures. It nourishes and sustains all through the power of HaShem-יהו"ה that is within it. By its mouth they go out and by its mouth they come in to adhere to the name HaShem-יהו"ה, blessed is He, and there is no way, angle or manner of adhering to the name HaShem-יהו"ה, except through His title Lord-Adona”y-אדנ"י.²³That is, the Name HaShem-יהו״ה is entirely beyond fathom and grasp, and is thus ineffable, as previously mentioned. Therefore, this title is the treasury of His unique Name HaShem-יהו"ה and is the Sanctuary-Heichal-היכל within which HaShem-יהו"ה dwells.²⁴As Rabbi Yosef Gikatilla explained at length in his foundational work, Ginat Egoz, the title Lord-Adona”y-אדנ״י-65 is called the Sanctuary-Heichal-היכ״ל-65 within which the Name HaShem-יהו״ה-26 and the explanation of His Unity, “HaShem is One-יהו״ה אח״ד-39” are concealed. Thus, when the term “Sanctuary-Heichal-היכ״ל-65” is used in the Torah in reference to HaShem-יהו״ה, it is a reference to His title Lord-Adona”y-אדנ״י-65. An example of this is the verse (Habakkuk 2:20), “But when Hashem-יהו״ה is in the Sanctuary-Heichal-היכל-65 of His holiness, the entire earth is silent-Hass-הס-65 before Him.” (See at greater length in Ginat Egoz translated as HaShem is One, Vol. 1, The Gate of the Sanctuary – Shaar HaHeichal.) Therefore, throughout Torah, we generally pronounce His title Lord-Adona”y-אדנ"י in place of His name HaShem-יהו"ה. This is to say that whoever seeks HaShem-יהו"ה will find Him in His title Lord-Adona”y-אדנ"י.