Don't let anything make you anxious, but rather be thankful and through prayer and petition, make your requests known to God... -Philippians 4:6
Don't let your heart be troubled, neither let it be afraid. Peace I leave with you. Peace I give to you, but not like earthly, worldly tranquility; -John 14:27
...and the peace of God which transcends, surpasses all understanding will guard your heart and mind. -Philippians 4:7