"Then King Nebuchadnezzar leaped to his feet in amazement and asked his advisers, 'Weren't there three men that we tied up and threw into the fire?' They replied, 'Certainly, O king.' He said, 'Look! I see four men walking around in the fire, unbound and unharmed, and the fourth looks like a son of the gods.'" NIV translation
The KJV translation is misleading as it makes it seem like the king recognized Jesus as the Son of God but he did not. The king was shocked to see not only the men that they threw into the furnace alive and well but also one "like a son of the gods". When people see Jesus walking and working in our lives, many will not recognize Him but some will want to draw near to us and we will have the opportunity to tell them about Him.
"Nebuchadnezzar then approached the opening of the blazing furnace and shouted, 'Shadrach. Meshach and Abednego, servants of the Most High God, come out! Come here!' So Shadrach, Meshach, and Abednego came out of the fire, and the satraps, prefects, governors and royal advisers crowded around them. They saw that the fire had not harmed their bodies, nor was a hair of their heads singed; their robes were not scorched, and there was no smell of fire on them." NIV translation
The king called the guys out of the furnace and acknowledged that they were servants of God. All of the royal officials could see that they had not been affected by the fire. Just as the king and officials were watching the guys in the fire, there are always people watching us. They want to see if we hold onto the faith that we proclaim when things get tough.
When we hold on to Jesus and let Him bring us through the fires, those people that are watching will be amazed and see the glory of God at work. Many times, this will give us the opportunity to be a witness to them of the power of Jesus Christ.
"Then Nebuchadnezzar said, 'Praise be to the God of Shadrach, Meshach and Abednego, who has sent his angel and rescued his servants! They trusted in him and defied the king's command and were willing to give up their lives rather than serve or worship any god except their own God.'" NIV translation
We see that, by this demonstration of their faith, the king ended up praising God. This is amazing and brings up the question of why this is not happening very much in our world today. We find the answer in the king's own words. God sent Jesus to take care of His people as they walked in faith. They did not look or act like those around them and try to blend in as much of the "church" is doing today. They were not afraid to lose their life if that is what was going to happen. Today, it seems like everyone wants to go to heaven as long as it is a long time in the future. The simple fact is that, if we trust in God as these three men did, then we will be able to say "For to me, to live is Christ and to die is gain." just as Paul did (see Philippians 1:21). When we walk in faith instead of fear, Jesus will walk with us! Just like the king, when people see Jesus walking with us, they will want to know Him and praise Him.
"'Therefore I decree that the people of any nation or language who say anything against the God of Shadrach, Meshach and Abednego be cut into pieces and their houses be turned into piles of rubble, for no other god can save in this way.' Then the king promoted Shadrach, Meshach and Abednego in the province of Babylon." NIV translation
The king ordered that anyone who commits blasphemy would be killed and their homes destroyed. This happened because he saw the demonstration of God's power through the faith of these men while they were in the fire. We also see that their faith in God also brought them favor with men as they got a promotion from the king. We, too, can expect favor from people that God places in our path as we walk in faith with Him.