For "We wrestle not against flesh and blood, but against principalities, against powers, against rulers of the darkness of the world, against spiritual wickedness in high places." - Ephesians 6:12
When one finally realizes this, how much easier it is to forgive others. These demonic forces can influence humans lives and can come as accusing voices, whispers in the heart, and even murderous or lustful thoughts coming from no where. Thankfully, most of the angels of God are still with Him and can give the feeling of peace and protection and even show up physically as a heaven-sent helper while one is in crisis.
There have been many corroborating stories throughout history of angels walking and talking in human form and protecting us. One angel can destroy a whole army as they have done for Israel.
On the other hand, the demonic fallen angels can possess, torment, and cause physical illness to humans. They can impose on our thoughts and influence wrong decisions. The devil (Lucifer the fallen angel) can cause disasters, disease, and death with the permission of God.
But there is much hope because Jesus came to destroy the works of the devil and he defeated him on the cross. Once we know this, we can use the Word of God as a sword to defeat every attack by resisting Satan and using the Word against him. Without reading God's Word, one is open to all kinds of lies and deceptions. Christians are especially attacked and must engage in spiritual warfare by coming against it by the power of the Word (the name of Jesus because He is the Word of God) or the Word in Scripture as Jesus did when Satan tried to tempt him. We are given authority over the devil and his demons by Jesus to do what he did in His name to defeat them.
The battleground of the mind is fighting the feelings of worthlessness, hopelessness and helplessness by knowing and repeating scriptures that help us and give us hope and tell us we are the righteousness of God and we were all created in His image and that we can do all things through Christ who strengthens us with power to overcome the wicked works of these evil ones.
We are told to continue the works that Jesus did while He was on earth which consisted of spreading the gospel of the good news that we can be saved from hell and have eternal life now because of our sin debt being paid by Jesus death on the cross because God's law requires that there be a payment of blood for a debt of sin. We should also heal the sick as Jesus did. Much of the time when He healed the sick, He cast out demons as they are often the perpetrators of sickness and disease.
Unfortunately, even though Satan has been ultimately defeated and we have been given the marvelous gift of power over him and the chance for eternal life, Satan has not yet been cast into the lake of fire and is still roaming about seeking who he may devour as the scriptures proclaim.
But as present calamities play out and prophesies are just about culminating in fulfillment, it is quite probable that very soon he will be imprisoned in that burning lake, no longer to reek havoc amongst humans for 1000 years and that should give us all hope. We are given the awesome promise that if we overcome all of the this and prevail to the end of our lives still believing in Jesus Christ as our Savior, then we will inherit eternal life with our Lord.