Consider for a moment, this photograph, taken from the deck of my apartment in late September:
What do you see?
Do you see a gorgeous, sunlit tree whose leaves are starting to change?
Or do you see a city street, parked cars, and an orange traffic cone?
Do you choose to appreciate the subtle beauty of the leaves’ colors as they transition from green to yellow to orange to red?
Or do you choose to be annoyed that your view of the tree is obstructed by powerlines?
The details you pay attention to affect your thoughts, which, in turn, affect your emotions and actions. If you want to take control of the feedback loop that controls your life, you must take control of where you put your attention.
You can choose what to focus on. Some objects of focus make you feel happy; others make you feel upset.