It is one thing fighting an enemy that you can see, but it is quite another fighting an enemy that you cannot see!! In such situations, one is fully dependent upon intelligence, namely the gathering of information for the purpose of making visible what is invisible. Dear Brethren, we are in an all out war, "...not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places" (Eph. 6:12).
This world system lies under the rule of the prince of this world whose express desire is to conform us to its system and its values. We as believers must contend in the battle for our minds. What are we allowing to influence us? Is it the Word of God or the spirit of this age?