We are told how to have the peace of God that surpasses all understanding, by not worrying! By making our prayers and requests known to God and thanking Him as we do so. That's faith in action, you ask God for something and thank Him at the same time as if you have already received it!
Rejoice in the Lord always! Have faith, do not worry, rejoice! Praise Him through the storm, praise Him after the storm, praise Him always. Our God of peace will grant you peace! In Jesus' Name, Amen.
Rejoice in the Lord always. Again I will say, rejoice! Let your gentleness be known to all men. The Lord is at hand. Be anxious for nothing, 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 minds through Christ Jesus. Finally, brethren, whatever things are true, whatever things are noble, whatever things are just, whatever things are pure, whatever things are lovely, whatever things are of good report, if there is any virtue and if there is anything praiseworthy--meditate on these things. The things which you learned and received and heard and saw in me, these do, and the God of peace will be with you. •~Philippians 4:4-9~•