Here’s an amazing thing you can do to explore and improve your own mind. Sit comfortably in a relaxed position. With each in-breath say, “I take as given that…” and then during your relaxed out-breath, think of and say something positive to finish the sentence. Don’t judge it, just say it.
After several of these, I became anxious that the practice was unsustainable, that I would run out of new positive things to say, and therefore I would not be able to breathe out.