For this cause we also, since the day we heard it, do not cease to pray for you, and to desire that ye might be filled with the knowledge of his will in all wisdom and spiritual understanding;

— Colossians 1:9

"Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God.  And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus."