It Is Written

Luke 4:4 And Jesus answered him, saying, It is written, That man shall not live by bread alone, but by every word of God.

Here is our answer to the devil when he tempts; speak the word of God. The just shall live by faith. We do not fight the devil in physical ways, we do not allow him to control our fleshly desires by catering to lusts of the flesh. Satan always comes at us through the flesh, he wants us to work in the natural world, but Jesus shows us what we must do. The devil is a spirit, a fallen angel with a host of demons sent to do his work in the minds and bodies of the spiritually weak. Cutting our body, eating disorders, addictions to sexual desires, these are all encouraged by satan and his devils. To resist the devil we must use our Spiritual weapons, the sword of the Spirit, the word of God. We must wear the whole Spiritual armor of God as written in Ephesians 6.

Eph 6:10 Finally, my brethren, be strong in the Lord, and in the power of his might.
Eph 6:11 Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.

James 4:7 Submit yourselves therefore to God. Resist the devil, and he will flee from you.

We resist the devil by obeying God and speaking his word.

We have those days when we are feeling out of sorts.  Keep going, read the word of God, speak the name of Jesus.  He is our strength and things will get better. Reach out to help or encourage someone else.

Gal 6:9  And let us not grow weary of doing good, for in due season we will reap, if we do not give up. 

Gal 6:10  So then, as we have opportunity, let us do good to everyone, and especially to those who are of the household of faith.