The Bible says, Are not all angels ministering spirits sent to serve those who WILL inherit salvation? (Hebrews 1:14). For He (God) WILL command His angels concerning you to guard you in all your ways;....(Psalm 91:11). Do NOT forget to entertain strangers, for by so doing some people have entertained angels without knowing it. (Hebrews 13:2; Genesis 18:1-4,NIV).