I believe that angels are spiritual beings created by God to be His messengers. Whether they are around the throne room of God, or ministering here on the earth, they are ceaseless in their worship and obedience towards the LORD. Angels, while glorious in nature, are not created in the image of God. They are, however, powerful warriors with God as their commander, and have been given the capacity to take on human form. Angels were also given the important roles of ministering to the saints of God and bringing about judgement on the wicked (Ps 103:19-21; Matt 1:20-23; Heb 1:14; Rev 7-8).
I believe that like mankind, angels were created as moral creatures. They have the capacity for sin. Unlike mankind, however, angels who rebelled against God have no hope of salvation. Their fate has been eternally sealed by Him. These fallen angels are better known as demons, with Satan (Lucifer) being their leader (1 Tim 5:21; 2 Pet 2:4; Rev 12:7-12).
I believe that Satan and his demons are enemies of God and His people. Satan has been deceiving mankind from the very beginning, starting with Eve. Before we are born again and made children of God, we are children of a different father, the Devil. Satan is currently the prince of this fallen world, but one day he and his demons will be judged and cast into the lake of fire. Believers should be watchful and aware of demonic activity, but they have no reason to fear the powers of darkness because Christ defeated them on the cross. Satan has never been, nor will he ever be God’s equal (Gen 3; John 8:44-45; Eph 2:2; Rev 20:10).
I hope this helps aid you in your study of God’s Word. Please don’t shy away from asking any questions you might have. Also, if you see something that concerns you from a theological standpoint please let me know. I am not inerrant.