As the lowest of the three groups of celestial beings, angels have taken on the appearance of human males to act as an interface between God and man but are never to be worshipped (Romans 1:24-25). In Genesis 32, Jacob clearly sees angels and recognizes them as such. On the other hand, in Tobit, Archangel Raphael was sent as a healer and was not recognized. It may be for this reason that scripture reminds us in Hebrews 13:2 to always be kind and charitable to strangers for we never know when we will be entertaining angels.
Through the Eyes of Christ»