Some people can play the guitar.
A very few others, like Warren Buttler, can express what is in their hearts. Such is The Properties of Mercy , one of the best ambient solo guitar recordings I've heard. In that time he was a policeman and then in a counter-terrorism unit with the Federal Air Marshals. When you listen to his music, you'll hear that Warren brings a calling to his craft. Each of the nine songs tells a musical story, and so, the listener finds self-involvement in this ambient music.