Cherubim and sanobim are by nature very near the morontia level of existence, and they prove to be most efficient in the borderland work of the physical, morontial, and spiritual domains. These children of the local universe Mother Spirit are characterized by “fourth creatures” are quasi-material. 
These “fourth creatures” of the angelic orders always retain their quasi-material characteristics. They will continue on as cherubim and sanobim and do not ascend to seraphic status.  Perform indispensible borderline tasks.  They are similar to midwayers.