Philippians 4v4 Rejoice in the Lord always. I will say it again: Rejoice! 5 Let your gentleness be evident to all. The Lord is near. 6 Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God. 7 And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus.

Our worry is defeated as we place it in the hands of the Lord. There is no need for anxiousness when we have a mighty God who provides. He will layer our minds with the peace that comes from the truth in His word. This is the battlefield of faith, truly believing God will take care of it all.

8 Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.

The shield for spiritual warfare of the mind.