Years ago, I went to visit a convalescent hospital. The patients there were extremely ill and for most, it was their "last stop." There was a common area and in it was a piano. I lifted up the piano bench and saw a book of old songs. I sat down and started to play and sing them. There were songs like "You Are My Sunshine," "The Sidewalks of New York," "Bicycle Built for Two," and more. Before long, a large crowd had gathered around me and began to sing along.
When I finished, a woman in her 50s came up to me in tears. She said, "My mother had a stroke two years ago and has never said a word in all that time. Today she sang with you!" I started to cry, too.
You never know how one simple act can make a difference. Don't underestimate what you are capable of.