Both the Epistle and the Gospel for the Eleventh Sunday after Trinity are especially rich passages. In I Corinthians 15:1-11, St. Paul speaks of two related topics, the core Christian message and his ministry as an Apostle. He affirms that he hands on the message that he received about Jesus Christ. This summary message is a sort of early Christian creed somewhat similar to the second article or section of the Apostles' and Nicene Creeds. Christ suffered and died for our sins, was buried, and rose from the dead to be seen by numerous faithful witnesses. And Paul's apostolic ministry proclaims this Christ-centered message through divine grace.
The Gospel from St. Luke 18:9-14 is the parable of the Pharisee and the tax collector going to the Temple to pray. This parable is a warning against pride and self-righteousness and an encouragement to repentance and humble faith in divine mercy. We should pursue goodness and holiness, but even at our best, we are still sinners who must seek God's forgiveness, mercy, and grace.