One plus one can equal a lot more than two. Consider Fernando, from Brazil, and Cecilia, from Uraguay.
When I watch this video of them four-handing a guitar, my cheeks start to hurt, because I cannot stop smiling. The joy with which they play spills over and fills me up.
Truth is...cooperation and collaboration really can create something better than the sum of the individual parts. None of us is as smart, wise, good, or creative as ALL of us.