The king of Babylon came to visit Hezekiah after hearing about his recovery from sickness. Hezekiah, being so grateful for God healing him, he welcomed the Babylonian king into his home. I completely understand Hezekiah's jubilation over another chance at life; however, in this situation, he made a mistake by opening up the doors of his kingdom and showing all the treasures to anyone from Babylon, especially the king. Isaiah reprimanded him, telling him that God said that because of this mistake, Babylon would carry away all the kingdom's treasures that his predecessors had collected, and his sons would become eunuchs. Hezekiah responded, "Good is the word of the LORD which thou hast spoken." I'm sure he said those words with a downcast heart, but he must have believed that whatever God had planned was sufficient. He understood that he would have peace for the rest of his life, but the people after him would face challenges.
We must be careful not to let the gifts God gives us, whether spiritual, physical, or monetary, become a source of pride. Be grateful but not boastful. Also, we don't know everyone whose words are like sugar on their lips but harbor evil in their heart like the king of Babylon, so we must keep to ourselves the information that could come back to haunt us.
Then said Hezekiah to Isaiah, Good is the word of the LORD which thou hast spoken. He said moreover, For there shall be peace and truth in my days. Isaiah 39:8