Paul, John & Paul

I am a rock. I am an island.* --Paul Simon, I Am A Rock.

No man is an island, entire of itself; every man is a piece of the continent, a part of the main. --John Donne, Meditation XVII.  

Bear one another's burdens, and thus fulfil the law of Christ. --the Apostle Paul, in his Letter to the Galatian church (6:2)  

*Yes, I know Paul Simon was being ironic. But we all know people who could sing this line unironically.