Stop right there.
#1 I don't know that Mister Ignatius wrote that for sure and neither do you. Too much time has passed for Catholic history revisionists to put words in his/anybodys mouth. His words ain't Gospel.
#2 The odds are he said no such thing because there was no such thing called the "Catholic Church". it came later. But I know, you'll have trouble with that because of what you have been taught.
#3 Why didn't Jesus mention the Catholic Church by name if He intended it to be the One True Church of choice? The answer is obvious, because He didn't intend that. Jesus was a Jew. The disciples were Jews. The Early Churchs were Jewish.
Dr. Robert Webber who is recognized by many as the authority on worship renewal. He taught at Wheaton College for 32 years as Professor of Theology and has authored over 40 books. Dr. Webber had a “life changing experience” at a Catholic conference center when he decided to receive the Eucharist . His testimony is recorded in a book entitled Signs of Wonder. Following is part of his experience in his own words:
“Closing my eyes, I allowed my life in the church to pass before me. My prejudices rose up within me: What are you doing here? You never worshiped in a Catholic setting, let alone received the bread and the wine from a Catholic priest! Then I heard my Catholic friends speak of their love for Christ, pray with fervency, and express a real desire to know the Scriptures and live by its authority. Those memories said, ‘Go ahead. After all, there is only one Lord, one church, one faith, one baptism, one Holy Communion.’ In that moment, God broke through the walls I had allowed to separate me from my brothers and sisters of different denominations. I am convinced the prejudices we hold and the walls we build between ourselves and other communities of Christians actually block our experience of God’s presence in our lives. Our biases cut us off from the spiritual communion of the fullness of the body of Christ. God dwells in his church, and to reject a part of God’s church is to reject him. Furthermore, rejecting apart of God’s church keeps us from experiencing what the creed calls “the communion of the Saints.” When God broke down my walls, he brought me into richer fellowship with the body of Christ throughout the world. You might say I was surprised by joy! I had never had an experience like that in my life. In that Catholic chapel, a new worship experience had bumped up against that old prejudice of mine, and a new attitude was born. I had taken into myself the experience of another tradition, I had been in dialogue with another worship tradition, and I was surely the richer for it.”