Philippians 4:8

Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things. 

Our thought life can be a battleground if we let it. The focus of our day can either be productive or destructive based on what we focus our mind. When we stand on the word of God, we stand on the power to control our thoughts by replacing them with the word. Our thoughts are the battle we must win daily to walk in peace and love towards ourselves and others.