You are Peter, and upon this rock I will build my Church.  The best nicknames capture something essential about a person.   United States President Abraham Lincoln, for instance, was called “Honest Abe” for his great concern for the truth.   One story has it that as a store clerk in Illinois, he walked several miles to return a few cents to a customer he overcharged. Today’s Gospel (Matthew 16:18) tells us how Peter — whose real name was Simon...