Philippians 4:6 

Do not worry about anything, but in everything by prayer and supplication with thanksgiving let your    requests be made known to God, and the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus.

Even though trouble comes and problems occur, God wants us to be at peace inside and out.  His word tells us to follow peace with all men and even though it may be difficult sometimes, he said he would take care of our enemies all we have to do is be still and watch him work.