We are told directly in scripture that as believers, we have a real enemy and are in a spiritual war.
10 “Finally, my brethren, be strong in the Lord and in the power of His might. 11 Put on the whole armor of God, that you may be able to stand against the wiles of the devil. 12 For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places.”
8 Likewise also these dreamers defile the flesh, reject authority, and speak evil of dignitaries. 9 Yet Michael the archangel, in contending with the devil, when he disputed about the body of Moses, dared not bring against him a reviling accusation, but said, “The Lord rebuke you!” 10 But these speak evil of whatever they do not know; and whatever they know naturally, like brute beasts, in these things, they corrupt themselves. 11 Woe to them!
MORE TO COME…
“And if our gospel is veiled, it is veiled to those who are perishing, in their case, the god of this world has blinded the minds of the unbelievers, to keep them from seeing the light of the gospel of the glory of Christ, who is the image of God.”
2 Corinthians 43,4
“Jesus said to them, “If God were your father, you would love me, for I came from God and I am here. I came not of my own accord, but he sent me. Why do you not understand what I say? It is because you cannot bear to hear my word. You are of your father the devil, and your will is to do your fathers desires. He was a murderer from the beginning and does not stand in the truth because there is no truth in him. When he lies, he speaks out of his own character, for he is a liar and the father of lies. “
“Then Jesus was led up by the Spirit into the wilderness to be tempted by the Devil.”