Wow, that was really touching!
Years ago I was with a Christmas caroling group that played nursing homes. After the program in the rec room, the rest of the singers moved on to sing down the hallways and in the rooms of those who weren't able to make it. I stayed behind and played some songs on my classical guitar.
After I was done, a lady came up to me to thank me. She said her father (whose bed had been wheeled into the rec room) hadn't shown any emotion or been communicative in a long time. She said while I was playing, he squeezed her hand and started to cry. I will never forget that and feel honored that my playing, humble as it was, could actually move someone.
CountryMouse, I think most of us here will attest that music can have therapeutic benefits. I have read some studies lately that say actually
playing a musical instrument can help avoid avoid mental decline because it actively engages the brain to a degree more passive activities (like watching tv) don't.
My mother was recently diagnosed with Alzheimers (she's 83). Almost every night of her life, from after dinner until bedtime, she did nothing but watch tv. It's been sad to watch her decline.