It seems reasonable to me that a person who is told "No" over and over again could become discouraged and that continual rejection might lead someone to feel less satisfied with life, whereas hearing "Yes" and being accepted could have a more positive effect. And, perhaps just seeing the word "Yes" is enough to provide results. The brain is certainly complex and mysterious enough to me that I am willing to consider this possibility.
I wonder if you will join me in an experiment. Find a piece of paper and write the word "Yes" on it multiple times - in big letters and small letters - so that it covers the whole page. Hang up this piece of paper on the wall of your house/apartment somewhere where you can see it (by the piano, by your desk, in the kitchen or bathroom, etc.) and leave it there for a week or two at some time when you will be around (and not on vacation somewhere else). Don't try to judge the effects it has on you. Just let it be there. I'm going to ask you about it later. :-)