When you replace your negative beliefs with positive ones, you can change the course of your life.
Challenge:
The first place to look for positive beliefs is in your faith. Then take a thorough look at all your blessings and charge your attitude with gratitude. This alone will fill you with enough positive momentum to change the course of your life.
Reference:
Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.
Philippians 4:8 (NABRE)