"For he will command his angels concerning you to guard you in all your ways."
I had angels visit me while in bed! I prayed this prayer three nights in a row before bed. I woke up and there was a big ball of white light on my side! It went swerving out the window, side to side! Then the next two mornings, shining lights were floating on the ceiling.
Psalm 91 is an affirmation of faith in divine protection from enemies both superhuman (v. 1-6) and subhuman (v. 13). It is centered in a belief that guardian angels are always present and can be called upon whenever needed.