"He who says he is in the light, and hates his brother, is in darkness until now. He who loves his brother, abides in the light, and there is no cause for stumbling in him. But he who hates his brother is in darkness and walks in darkness, and does not know where he is going, because the darkness has blinded his eyes."
"Finally, my brothers, be strong in the Lord and in the power of His might. Put on the whole armor of God, that you may be able to stand against the wiles of the evil one. 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."
It's real, folks. These words are 2000 years old, and the battle is still raging.