I am in charge of my state of mind, and I choose to be grateful and happy.

You cannot choose to be happy the way you choose a shirt. Anyone who has tried to talk themselves out of a bad mood knows how badly the direct approach works.

What's within reach sits one layer down: what you look at, what you rehearse, who you spend the evening with, whether you eat something and go outside. Mood follows those. Not immediately, and not obediently, but it follows.

Saying you're in charge of your mind is too strong. Saying you're in charge of its inputs is about right, and far more useful.

Change one input today instead of arguing with the feeling.