James 1:6-8
But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. For let not that man think that he shall receive any thing of the Lord.
A double minded man is unstable in all his ways.

One day your a believer, the next day you need to be shown how to believe. They that waver in faith to God will not get what they ask for. You must believe what you ask Him for.

Faith is having complete trust that God will do what he said He would do.

1 Corinthians 12:6-9
And there are diversities of operations, but it is the same God which worketh all in all. But the manifestation of the Spirit is given to every man to profit withal. For to one is given by the Spirit the word of wisdom; to another the word of knowledge by the same Spirit; To another faith by the same Spirit; to another the gifts of healing by the same Spirit;

God gives you abilities according to the faith you have toward God.

1 Peter 5:6-7
Humble yourselves therefore under the mighty hand of God, that he may exalt you in due time:
Casting all your care upon him; for he careth for you.

1 Peter 5:8

Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:

The fact that Satan is seeking means he can’t influence everyone, yet he preys on those who are weak. If you don’t have enough faith in God, Satan has unclean spirit hurling evil upon the body, looking for weak spots to breach your spiritual infrastructure.

The reason why we can’t be active in spiritual warfare is because we fear that it’s too strong. Then we need to ask God to give the faith and tools to go against the spiritual stronghold.

All believers are in a war against Satan.

Ephesians 6:12
For we wrestle 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.

John 10:10
The thief cometh not, but for to steal, and to kill, and to destroy: I am come that they might have life, and that they might have it more abundantly.

Satan comes to steal your joy, kill your hope, and destroy your faith; these are the things he does.

If you don’t have the faith that equals the task you ask of God, spiritual strongholds won’t be broken in your life. Believers can’t be demon possessed, but harassed and oppressed.

We often times are fighting against the spiritual symptoms of evil, yet that won’t solve the problem. Just as a decongestant doesn’t heal the cold but only clears the nasal passages, so does trying to go against spiritual symptoms of evil instead of the root of the spiritual symptoms of evil.