Romans 12:21 has become one of my favorite bible verses because I like to take the word evil and replace it with actual evils that come up in my own life and actual truths about how I can overcome them.
For instance I like to look at it this way
do not be overcome with fear, but overcome fear with courage,
overcome worry with trust,
overcome guilt with forgiveness,
overcome doubt with confidence,
overcome failure with grace,
overcome lies with truth,
and most importantly do not be overcome by Satan, but overcome Satan (who is all lies) with JESUS CHRIST (who is all TRUTH!)
I have to remind myself constantly. I do not have to be afraid of “evil” (doubt, worry, selfishness, fear, stress, failure, etc.) anymore when God says He has already overcome it. I do not have to feel that all my mistakes make me unworthy and not good enough, because God sent Christ who conquered all that with courage, trust, forgiveness, confidence, grace, and truth!
God always wins His battles – We need Him on our side to fight against the devil. This battle is crazy, and so many times we’re going to get knocked down, but when we learn to trust and rely on God’s strength then we can beat back the lies of the devil! God wins every battle! God is faithful and will protect us and give us strength against every evil we will ever face! (2 Thessalonians 3:3)
Together, I know we can get through this because Jesus defeated sin, death, and hell so our problems will be easy for Him to take care of!