Philippians 4:4-9, HCSBRejoice in the Lord always. I will say it again: Rejoice! Let your graciousness be known to everyone. The Lord is near. Don’t worry about anything, but in everything, through prayer and petition with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses every thought, will guard your hearts and minds in Christ Jesus.
Finally brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable—if there is any moral excellence and if there is any praise—dwell on these things. Do what you have learned and received and heard and seen in me, and the God of peace will be with you.
It's easy to think that the Christian's battle against the self and against the world is waged in the realm of action. In reality, the mind is an even more violent battleground, the events of which determine our actions, which are visible to others.
Let us set our minds to the discipline Paul commands in his letter to the Philippians, praying for and depending on God's strength to change the way we think. The end result will be a closer walk with Him and greater opportunities to glorify Him in all we do.