It's a rare person who doesn't have something to worry about and some people worry even when they don't have something to worry about. Their lives are filled with visions of catastrophes waiting to happen. No doubt that is more a matter of temperament than of anything else.
A remarkable feature of Jesus' peace is that it doesn't depend on our temperaments or any circumstance. It can overcome any barrier and abide in our hearts even in the presence of true catastrophe. When he visited the apostles in the Upper Room after his resurrection, he found them filled with fears and discouragement. Yet Jesus was able to dispel their grim mood with a few words, conveying his peace (Jn 20). He continues to give his peace to his followers even today. At the very moment when we feel most disturbed he is suddenly present to our minds to assure us that all will be well, for he is with us.
Lord, I believe that your light can penetrate any darkness and that your power can overcome any obstacle. Nothing in heaven or on earth can separate me from you. Come to me and abide with me this day. I surrender my worries to you.