Why repetition can actually change something
The strongest non-mystical case for affirmations is not that reality bends because a sentence exists. It is that repeated language shapes attention, emotional expectation, memory salience, and eventually behavior. What you hear over and over becomes easier to notice, easier to feel, and easier to act from.
That matters because most people are not limited by a total lack of desire. They are limited by conflict: part of them wants the outcome, another part expects the old pattern. Repetition does not erase that conflict instantly, but it can reduce the distance between the life you want and the inner voice you hear every day.