The statue of St. Matthew over there portrays him holding a book, and the picture on the front cover the service booklet has him about to write in one. Is he about to make an entry in a tax ledger or write a gospel?
Who are we celebrating when we keep the feast of St. Matthew, the apostle and evangelist? Is it one person or two? The clergy are sometimes accused of sheltering their flocks from the results of biblical scholarship, so as not to frighten the horses. Let me say that it is quite clear that the apostle and the evangelist are two quite separate characters. The name of the apostle came to be attached to the gospel written by an anonymous author. The ancient world did not have our scruples about copyright and plagiarism.
But let's look on the bright side: it's like going to the supermarket and getting two for the price of one: buy one and you get one free. You have two patron saints to pray for you.