I have finished a research on the words, (devil and devils), and was greatly surprised to find the word devil does not appear in the Old Testament of the King James Bible even one time, and the word, devils, appear only four times therein. Then I was further surprised to find the plural of (devils), appears 48 times in the New Testament and the single word, devil, appears 58 times.. After Jesus came to earth He often exposed the devil and gave strong warnings against him.
Now in the New Testament we find the words devil, and devils, mentioned so many times space permits printing of only a few. But it will definitely benefit anyone who finds Jesus’s warnings therein and embraces them. Again, we can only use space to randomly print a few, with hope it will prove a blessing in this study. It is a fact, documented by scripture, that devils can invade, completely posses, and live in people and animals. It is most unfortunate that people can be devil possessed, and not know it. Devils can impose their desires upon their victims in various ways and cause them to do things they do not want to practice.
James 2:19 "Thou believest there is one God: thou doest well: the devils also believe, and tremble".
And now to view this from a position many believe we are living in today; look at the message we find in 1 Timothy 4:1 "Now the Spirit speaketh expressly, that in the latter times, some shall depart from the faith, giving heed to seducing spirits and doctrines of devils." Please read several verses there. If we do not see this, we are living, in darkness. Revelation 16:14-16 "For they are the spirits of devils, working miracles which go forth unto the kings of the earth and of the whole world to gather them to the battle of that great day of God Almighty. And he gathers them together into a place called in the Hebrew tongue, Armageddon." Yes, the battle of Armageddon that so many greatly fear will become a reality, as we see in this last scripture. "Satan’s devils will be gathered to meet Christ and all the devils and terrorists including old Satan himself will be destroyed." Then there will be the complete peace God has promised to all His people. God’s people will not have to fight in that battle, Christ alone will defeat all evil by the sword of His mouth which is the Word and Truth of God.
The scriptures are too numerous to mention where Jesus exercised His power to cast out devils and heal the sick, and it is always noted that they knew Him. There is a spirit world that we cannot see where Satan has his devil spirits and God has His holy spirits. But we can know the evil spirits and the holy spirits are never found in the same heart, (body). If any person does not guard their heart, (body), well: Satan can and may inject an evil spirit.