You will keep in perfect peace him whose mind is steadfast, because he trusts in you. Isaiah 26:3
 
The mind controlled by the Spirit is life and peace. Romans 8:6
 
The plans of the righteous are just, but advice of the wicked is deceitful. Proverbs 12:5
 
Blessed are the pure in heart, for they will see God. Matthew 5:8
 
Be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is - his good, pleasing and perfect will. Romans 12:2
 
Finally brothers, 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. Philippians 4:8