Faith powerful because of the knowledge it imparts

Matthew 5:8

At the time of the Franco-German War, some twelve years ago, the success of the Germans was largely attributed to the superiority of their intelligence department. They knew so much more about the strength and position of the enemy, and their own available resources, than did the French, that they conquered. 

Well, faith supplies the general intelligence department of the soul. Faith reports all that is of most importance to a being who is wrestling, 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. True, such information may not be acted on. The truant soul often prevails against the sense of evil; but faith does supply the information which may be acted on, and thus it contributes very efficiently indeed, a first condition of religious success. 

(Canon Liddon.)