Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.
Yes, I think of that verse a lot. It's beautiful and reminds us not to judge too quickly.
Maybe the Apostle was cautioning us that none of us knows the names of the elect. If we had met the thief on the cross on Wednesday, we'd not have recognized him a week later. 8~)
This is a topic I'm not settled on. It's interesting. I even liked the movie, "City of Angels," in a dreamy kind of way.
But all this is beside the point as to whether or not we're supposed to pray to angels, saints and dead people. We're not.