Proverbs 4:23

Above all else, guard your heart, for everything you do flows from it.

Jeremiah 29:11

For I know the plans I have for you, declares the Lord,
plans to prosper you and not to harm you, plans to give you hope and a future.

2 Timothy 1:7

For God did not give us a Spirit of fear but of power and love and self-control.

Philippians 4:6-7

 In nothing be anxious; but in everything by prayer and supplication with thanksgiving let your requests
be made known unto God.And the peace of God, which passeth all understanding,
shall guard your hearts and your thoughts in Christ Jesus.