Possible meanings are 1) The word "us" refers to God and his angels. 2) The Lord refers to himself as "us." When a person refers to himself this way, it emphasizes the person's authority and importance.
## this people ##
"the people of Israel"
## Listen, but do not understand; see, but not perceive ##
"Listen very carefully, but may you not understand; look very carefully, but may you not know."