He [Joseph] explained the difference between an angel and a ministering spirit; the one a resurrected or translated body, with its spirit ministering to embodied spirits---the other a disembodied spirit, visiting and ministering to disembodied spirits. Jesus Christ became a ministering spirit (while His body was lying in the sepulchre) to the spirits in prison, to fulfill an important part of His mission, without which He could not have perfected His work, or entered into His rest. After His resurrection He appeared as an angel to His disciples.
Translated bodies cannot enter into rest until they have undergone a change equivalent to death. Translated bodies are designed for future missions.
The angel that appeared to John on the Isle of Patmos was a translated or resurrected body (i.e. personage). Jesus Christ went in body after His resurrection, to minister to resurrected bodies. [History of the Church, 4:425, Sunday, October 3, 1841; TPJS, p. 191.]
[Paper, "Concepts Quotations Dealing With the Origin, Identity Position of Adam Eve"]