"The king called out for the enchanters, astrologers, and diviners to be brought and said to these wise men of Babylon, 'Whoever reads this writing and tells me what it means will be clothed in purple and have a gold chain placed around his neck, and he will be made the third highest ruler in the kingdom.'" NIV translation
The king called for all of his wise men to interpret the writing and offered a big reward. The purple clothes and gold chain were a status symbol of the day as they were worn by royalty. The one that could tell him the meaning was promised a royal position. The reward was to be the number three man in the kingdom and we remember that the number three is associated with the earthly display of God's will. Although Belshazzar had the title of king, his father was actually the king but he was away at war and so this royal position would be next to the king.
"Then all the king's wise men came in, but they could not read the writing or tell the king what it meant. So King Belshazzar became even more terrified and his face grew more pale. His nobles were baffled." NIV translation
When the king tried to get men that did not know God to interpret things from God, it did not work and so he became even more scared.
The same thing applies to our lives today, in that, if you want to know about the things of God, you will not find answers from the wisdom of the world. Understanding the things of God comes through the Holy Spirit and that is a gift that is reserved for those who accept Jesus Christ as their Lord and Savior.
"The queen, hearing the voices of the king and his nobles, came into the banquet hall. 'O king, live forever!' she said. 'Don't be alarmed! Don't look so pale! There is a man in your kingdom who has the spirit of the holy gods in him. In the time of your father he was found to have insight and intelligence and wisdom like that of the gods. King Nebuchadnezzar your father - your father the king, I say, - appointed him chief of the magicians, enchanters, astrologers and diviners. This man Daniel, whom the king called Belteshazzar, was found to have a keen mind and knowledge and understanding, and also the ability to interpret dreams, explain riddles and solve difficult problems. Call for Daniel, and he will tell you what the writing means.'" NIV translation
The queen remembered Daniel and advised the king to seek him for help in getting the meaning of the writing on the wall. It is interesting to note that the queen did not know God but she knew who to turn to in this difficult circumstance. As Christians, we need to ask ourselves whether those around us that are "lost" know to come to us when they do not know what to do. We need to be there when they get to the end of their rope (understanding) and have searched everywhere else for the answers. At that point, we can introduce them to the wisdom that can only come from God.