The Ark of the Covenant
In the most sacred and protected heart of the Temple of Solomon was placed the Ark of the Covenent, whose imagery may surprise you.
Cherubim is a plural Hebrew word with layers of meaning. In general it refers to highly awakened deities or angels.
The importance of the Ark cannot be overemphasized; see here how it was commanded of Moshe (Moses).
And HaShem spoke unto Moses, saying: 'Speak unto the children of Israel, that they take for Me an offering; of every man whose heart maketh him willing ye shall take My offering...
And let them make Me a sanctuary, that I may dwell among them...
And they shall make an ark of acacia-wood: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof, and a cubit and a half the height thereof. And thou shalt overlay it with pure gold, within and without shalt thou overlay it, and shalt make upon it a crown of gold round about. And thou shalt cast four rings of gold for it, and put them in the four feet thereof; and two rings shall be on the one side of it, and two rings on the other side of it. And thou shalt make staves of acacia-wood, and overlay them with gold. And thou shalt put the staves into the rings on the sides of the ark, wherewith to bear the ark. The staves shall be in the rings of the ark; they shall not be taken from it. And thou shalt put into the ark the testimony which I shall give thee.
And thou shalt make an ark-cover of pure gold: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof. And thou shalt make two cherubim of gold; of beaten work shalt thou make them, at the two ends of the ark-cover. And make one cherub at the one end, and one cherub at the other end; of one piece with the ark-cover shall ye make the cherubim of the two ends thereof. And the cherubim shall spread out their wings on high, screening the ark-cover with their wings, with their faces one to another; toward the ark-cover shall the faces of the cherubim be. And thou shalt put the ark-cover above upon the ark; and in the ark thou shalt put the testimony that I shall give thee.
And there I will meet with thee, and I will speak with thee from above the ark-cover, from between the two cherubim which are upon the ark of the testimony, of all things which I will give thee in commandment unto the children of Israel. - Shemot / Exodus 25
"Rabbi Katina said, 'When the Israelites would ascend [to the Holy Temple] on the festival, [the priest/kohen] would roll up the curtain for them, and display for them the cherubim, who were joined together [in an embrace].' The priest/kohen would then tell them, 'Behold the beloved feelings for you on the part of the Omnipresent are like the beloved feelings of a male for a female'."
Rabba bar Rav Shila explains that "[The cherubim appeared in the engravings] as a man joined in an embrace with his female companion" - Babylonian Talmud, Yoma 54a
In other words, God manifests through sexual union and guides those who work with this Holy mystery.
This indicates a profound relationship with Hindu and Buddhist Tantra, as displayed in the santuaries of their temples:
“Said Resh Lakish, ‘When the Gentiles entered the Sanctuary, they saw (the engravings of) the cherubim joined together in an embrace. They took (the engravings) out to the marketplace, and they said, Should these Israelites - whose blessing is a blessing and whose curse is a curse (so they are so close to G-d) - be involved in such (erotic) matters? Immediately, (the Romans) debased (the Israelites), as it is said, (Lamentations 1:8) All who once respected her (Israel), debased her, for they saw her nakedness.’” - Talmud, Yoma 54b