Sforno on Exodus 25:8:2

ושכנתי בתוכם (ט) ככל אשר אני מראה אותך וכו'. אשכון ביניהם לקבל תפלתם ועבודתם באותו האופן שאני מראה אותך שכינתי בהר על הכפרת בין שני הכרובים עם תבנית המשכן ועם תבנית כל כליו. כי אמנם תבנית המשכן תורה על כרובים, שהם שרפים עומדים ממעל לו הנראים לנביאים, ומהם בקדש, ומהם בקדש הקדשים, בשני מחברות מחוברות בקרסים להיות לאחדים לעבודת בוראם. וכן ראוי שיהיו בישראל כל קדושיו מחוברים אל ההמון להבין ולהורות. ובקדש הקדשים נתן התורה תוך גוף מצופה זהב מבית ומחוץ כאמרם ז''ל בזה (יומא פרק בא לו) כל תלמיד חכם שאין תוכו כברו אינו תלמיד חכם. ועל אותו הגוף שהוא הארון נתן כפורת כלו זהב, מורה על צלם אלהים בלתי מחובר עמו כלל. וכן כרובים פניהם איש אל אחיו מורים על פעולת המצאת המושכל וקבלתו, וזה בהביט אל התורה, כאמרו אל הכפרת יהיו פני הכרובים ובזה הם פורשים כנפים למעלה, כאמרו ארח חיים למעלה למשכיל ובזה יתעשת האלהים לנו כאמרו ואל זה אביט: 'ושכנתי בתוכם ככל אשר אני מראה אותך וגו, “I will dwell among them permanently in order to receive their prayers and their sacrificial offerings in a manner similar to the way I displayed My presence at the mountain.” Henceforth My presence will be manifest between the two cherubs on the lid of the Holy Ark as part of the overall structure called the Tabernacle. [I will paraphrase from here on in. Ed.]The author perceives of different degrees of holiness, just as the kabbalists perceive holiness in the extra terrestrial world as consisting of spiritually progressively higher different levels. The outer structure known as תבנית המקדש, “the format,” visual image, lead up to the cherubs in the innermost part of that structure. The very concept of the Tabernacle leads the intelligent viewer to conclude that hidden deep within it, G’d’s presence, שכינה must be manifest. The prophet Isaiah 6,2 phrased this as the שרפים עומדין ממעל לו, the types of angels of a rank known as “Seraphim” were in attendance above G’d’s throne. This was the closest to G’d’s essence that the prophets were shown in their visions. The terrestrial Tabernacle, if viewed as parallel to G’d’s throne in the celestial domains, contained different sections of progressively higher levels of sanctity which progressively restricted the type of people allowed to approach those levels. The Torah itself, for which the Holy Ark served as repository, was in an ark constructed of wood but overlaid with gold on the inside and on the outside, to reflect the saying of our sages in Yuma 72 that every Torah scholar whose external appearance did not reflect his internal stature is not a Torah scholar at all. The levels of sanctity in the Tabernacle, beginning already with the courtyard around it, were not sealed off from one another, but, on the contrary, were connected to one another all the way to the innermost sanctuary to demonstrate that sanctity is attainable progressively. On top of the physical box containing the spiritual teaching, the Torah, there was placed a lid also made from pure gold which symbolised the image of G’d. [in the sense that man was created in the image of G.d.] This lid was not linked, attached, to the ark itself at all. The detached nature of this “lid, כפורת,” symbolised that at a certain level of holiness there is no longer a physical bond with the human body, with the terrestrial domain, a domain which is essentially mortal, i.e. requiring regeneration from time to time. The description of the cherubs on top of the כפורת facing each other (verse 20) symbolises the interaction of the spiritual message contained in the Torah and its transmission to the human being studying it. The cherubs themselves are described as facing the lid, i.e. facing the Torah that is beneath that lid. As a result of such an attitude to Torah, i.e. looking to it for inspiration, the cherubs are then described as spreading their wings in an upward direction, as if reflecting that they had received spiritual inspiration enabling them to fly. This description of the cherubs’ posture reflects what Solomon described in Proverbs 15,24 אורח חיים למעלה למשכיל, “for an intelligent man the path of life is upward.” As a result of our relating to Torah in the manner described, we will merit what Isaiah 66,2 describes as ואל זה אביט, when he refers to the prerequisite character traits necessary to merit Divine inspiration.