Library Ignatius of Antioch Epistles (Middle Recension)
Romans, Chapter 3: Pray rather that I may attain to martyrdom
You have never envied any one; you have taught others. Now I desire that those things may be confirmed [by your conduct], which in your instructions you enjoin [on others]. Only request in my behalf both inward and outward strength, that I may not only speak, but [truly] will; and that I may not merely be called a Christian, but really be found to be one. For if I be truly found [a Christian], I may also be called one, and be then deemed faithful, when I shall no longer appear to the world. Nothing visible is eternal. For the things which are seen are temporal, but the things which are not seen are eternal.
For our God, Jesus Christ, now that He is with the Father, is all the more revealed [in His glory]. Christianity is not a thing of silence only, but also of [manifest] greatness.
English translation in Ante-Nicene Fathers, Vol. I (eds. Alexander Roberts and James Donaldson; Buffalo: Christian Literature Publishing Co., 1885). Public domain. Digital text via New Advent Church Fathers. ANF prints the shorter Greek (middle) recension.