Quantum physics tells us that everything is energy. Thoughts are energy. Emotions are energy in motion. Put those two concepts together and you cannot refute the fact that our thoughts lead to our emotions that lead to the world, the reality we each create.
You know the question is the glass half full or half empty? That is how you run your head. Do you see the good side of life or the bad side?
Whichever you choose to see is the one you will see. Guaranteed.