Daniel 4:2-3 I thought it good to declare the signs and wonders that the Most High God has worked for me. How great are His signs, and how mighty His wonders! His kingdom is an everlasting kingdom, and His dominion is from generation to generation.
The entirety of Daniel chapter 4 is a letter written by King Nebuchadnezzar, the most powerful man in the world at that time, to “all people’s, nations, and languages that dwell in all the earth” (v1)
He isn’t telling the story about the miracle God worked for Shadrach Meshach and Abednego. Now he has a testimony of what God has done for him and he basically was telling the whole world about it.
You may be amazed at the miracle God works for someone, and the testimony of God‘s power displayed in someone else’s life, but your human mind will often find a way to reason around it and discount it. But when it happens to you, you can have no argument against it.
Consider Paul. He heard the gospel that Stephen preached because he was standing there as Stephen was stoned. He heard the testimony of Steven and still continued to be a persecutor of the church. But when he had his own encounter with Jesus, it changed the course of his whole life.
This isn’t a second hand gospel and God doesn’t have step children. He wants each of us to have testimonies of our own (and we need to have them) of His power to save, heal, provide and deliver. And then He wants us to tell the world about it.