Speaking of demons?

A mish-mash of what I find interesting from my commentaries right now:

The New Testament uses two kindred words to denote the evil spirits which possessed men, and which were so often east out by Christ: διάμων, of which demon is a transcript, and which occurs, according to the best texts, only at Mat_8:31; and δαιμόνιον, which is not a diminutive, but the neuter of the adjective δαιμόνιος, of, or belonging to a demon. The cognate verb is δαιμονίζομαι to be possessed with a demon, as in Mar_1:32.  -Vincent's Word Studies

This evil sense the words always bear in the New Testament as well as in the Septuagint. Demons are synonymous with unclean spirits (Mar_5:12, Mar_5:15; Mar_3:22, Mar_3:30; Luk_4:33). They appear in connection with Satan (Luk_10:17, Luk_10:18; Luk_11:18, Luk_11:19); they are put in opposition to the Lord (1Co_10:20, 1Co_10:21); to the faith (1Ti_4:1). They are connected with idolatry (Rev_9:20; Rev_16:13, Rev_16:14). They are special powers of evil, influencing and disturbing the physical, mental, and moral being (Luk_13:11, Luk_13:16; Mar_5:2-5; Mar_7:25; Mat_12:45).Vincent's Word Studies