"O God, be merciful to me, a sinner" (Luke 18:13).
"Lord, I am not worthy that you should enter under my roof, but only say the word, and my soul shall be healed" (Matthew 8:8).
These two utterances are among the best-known prayers in the Bible. Immediately we recognize the first as the words of the tax collector in the temple area. No less readily do we identify the second as the words of the centurion, who begs that Jesus heal his servant. Moreover, we pray the centurion's words in every celebration of the Eucharist.