Ezekiel 41: artistic decoration in the vision of the temple

In Ezekiel 41, Ezekiel follows the man taking measures of the temple: the sancturay (in the middle?), the west side and the outer side. For instance:

15-18 He measured the length of the house facing the courtyard at the back of the Temple, including the shelters on each side: one hundred seventy-five feet. The main Sanctuary, the inner Sanctuary, and the vestibule facing the courtyard were paneled with wood, and had window frames and door frames in all three sections. From floor to windows the walls were paneled. Above the outside entrance to the inner Sanctuary and on the walls at regular intervals all around the inner Sanctuary and the main Sanctuary, angel-cherubim and palm trees were carved in alternating sequence.

As an engineer, sometimes, I have some difficult to appreciate art. The walls were decorated with  angel-cherubim and palm trees carved on them. Why? A friend of mine thought about the return of man to paradise guarded by angels as he enters in the sanctuary.