Ephesians 6:20

Nothing can be more blessed than that soul. In what does he glory? In bonds, in afflictions, in chains, in scars; "I bear branded on my body," saith he, "the marks of Jesus," as though they were some great trophy. And again, "For because of the hope of Israel," saith he, "I am bound with this chain." And again, "For which I am an ambassador in chains." What is this? Art thou not ashamed, art thou not afraid going about the world as a prisoner? Dost thou not fear lest any one should charge thy God with weakness? lest any one should on this account refuse to come near thee and to join the fold? No, saith he, not such are my bonds. They can shine brightly even in kings' palaces. "So that my bonds," saith he, "became manifest in Christ, throughout the whole praetorian guard: and most of the brethren in the Lord, being confident through my bonds, are more abundantly bold to speak the word of God without fear." Behold ye a force in bonds stronger than the raising of the dead. They beheld me bound, and they are the more courageous. For where bonds are, there of necessity is something great also. Where affliction is, there verily is salvation also, there verily is solace, there verily are great achievements. For when the devil kicks, then is he, doubtless, hit. When he binds God's servants, then most of all does the word gain ground.

"For which I am an ambassador in chains, that in it I may speak boldly, as I ought to speak"; that is, that I may answer with confidence, with courage, with great prudence.