The first thing the believers need to know is that they are a victorious people. This mentality alone will always defeat the enemy. Satan get weary of a Christian who doesn’t give up.
Your authority over the devil is the same authority that Jesus have. You have equal power in His name to defeat all wicked arrows of the enemies.
Therefore, understand that you are fighting from the victory stands. You can never be defeated without you defeating yourself. So, you must defeat yourself for the enemy to be able to defeat you.
Satan has lost all grips over you except those you allow him to have (if any). This mentality will always guarantee you a daily victory. So, even if you fall, if you keep getting back up, your authority and power over your enemies are forever guaranteed. Yes, forever guaranteed!
Do not believe in the devil’s lies. Check it out, we have equal status with Jesus because God adopted us like His Son, Jesus. This is who you are, but you need to know this.
Ephesians 1:18-21 NIV
I pray that the eyes of your heart may be enlightened in order that you may know the hope to which he has called you, the riches of his glorious inheritance in his holy people,  and his incomparably great power for us who believe. That power is the same as the mighty strength  he exerted when he raised Christ from the dead and seated him at his right hand in the heavenly realms,  far above all rule and authority, power and dominion, and every name that is invoked, not only in the present age but also in the one to come.
Live daily with this mentality and you will never experience defeat again.