Today is a perfect day to pray for the Pope and our bishop. It is also a perfect day to pray for Christian unity and to pick up a good book on the Church's history. Perhaps even pray with Matthew 16.
Grant, we pray, O Lord our God, that we may be sustained by the intercession of the blessed Apostles Peter and Paul, that, as through them you gave your Church the foundations of her heavenly office, so through them you may help her to eternal salvation.
From a sermon by Saint Augustine, bishop
The martyrs realized what they taught
This day has been made holy by the passion of the blessed apostles Peter and Paul. We are, therefore, not talking about some obscure martyrs. For their voice has gone forth to all the world, and to the ends of the earth their message. These martyrs realized what they taught: they pursued justice, they confessed the truth, they died for it.
Saint Peter, the first of the apostles and a fervent lover of Christ, merited to hear these words: I say to you that you are Peter, for he had said: You are the Christ, the Son of the living God. Then Christ said: And I say to you that you are Peter, and on this rock I will build my Church. On this rock I will build the faith that you now confess, and on your words: You are the Christ, the Son of the living God, I will build my Church. For you are Peter, and the name Peter comes from petra, the word for "rock," and not vice versa. "Peter" comes, therefore, from petra, just as "Christian" comes from Christ.