If you love music, you have a perfect "companion." Charles Darwin once said, "If I had the chance to live again, I would make a rule of reading poetry and listening to music at least once a week." Or, as Albert Einstein said: "If I weren't a physicist, I'd be a musician." And Jimi Hendrix considers the concept of music as his "religion."

I am always amazed and admired by people who can sing and play guitar simultaneously. When I was a kid, I used to stay in my room for hours listening to the music of the singer-songwriter I idolized. Growing up, I always played rock 'n' roll when doing housework and considered it a wonderful thing - now I know why.

Recent research shows that listening to music makes us happy and improves our physical health. Learning or training in harmony helps raise IQ and brings many benefits when we are old.