Rejoice in the Lord always; again I will say, rejoice. Let your reasonableness be known to everyone. The Lord is at hand; do not be anxious 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. Philippians 4: 4-7

The Christian’s anxiety about anything should be converted in thanksgiving for everything. That is how one gets to rejoice always. Our concern list should become our prayer list. And God will grant peace beyond understanding.