Undercover Boss is a television program about bosses who went undercover as new employees, to visit their managers. These managers had no idea who this recruit actually was!
That started me thinking: how many times God has turned up incognito, so to speak, and we haven’t realised? God is always with us, but sometimes we become so familiar with Him that we become unaware of his actual presence. Hebrews 13:1 Let love for your fellow believers continue and be a fixed practice with you [never let it fail]. 2 Do not forget or neglect or refuse to extend hospitality to strangers [in the brotherhood - being friendly, cordial and gracious, sharing the comforts of your home and doing your part generously] for, through it, some have entertained angels without knowing it.