2 Kings 4 ²³ So he said, “Why are you going to him today? It is neither the New Moon nor the Sabbath.” And she said, “It is well.” 
2 Kings 5 ²² And he said, “All is well. My master has sent me, saying, ‘Indeed, just now two young men of the sons of the prophets have come to me from the mountains of Ephraim. Please give them a talent of silver and two changes of garments.”

All is well & It is well
Both seem to be statements affirming a current situation. Sounds like one of those standard Christian answers to How are you doing? “Blessed and highly favored.” However, the Bible would beg to differ.

I found “All is well” in the Bible 3 times and “It is well” a total of 5 times. I could not help but see the vast difference in the way it was used in 2 Kings with the Shunammite Woman and Gehazi Elisha’s servant.

The Shunammite Woman offered up “It is well” in response to Elisha’s inquiry as to why she had come to seek him on a random day (not a Sabbath or Holy Day Celebration). Yet, IT was far from well, her son had just died and while heartbroken she was also angry that she had finally come to grips with her barreness; she was no longer longing for a child she was living her life when Elisha came in and declared that she would have a child. She even pleaded with him so she would not get her hopes up again only to be let down. So now with this child dying she felt betrayed by Elisha and would have to assume betrayed by God. Yet when she answered the Prophet her statement was also prophetic “It is well” as in although it is not well now it will be. And for that she received a miracle; her son was resurrected to life.

Now to the contrary, Gehazi Elisha’s servant declared that “All is well” on his way to deceive Naaman the Syrian. Gehazi was Elisha’s servant, so needless to say he was often in the presence of God doing miraculous work by the prophet. Yet his statemen, while very truthful of the situation, it was not so of his heart. He sought Naaman out of his Greed, seeking to be rewarded by this very grateful man for something he had not even done. Naaman had leprosy and Elisha healed him. Naaman wanted to pay Elisha handsomely for the miracle. However, Elisha was keenly aware that he did not do the miracle but God. Gehazi seeing just how much the Syrian was willing to give felt he deserved some nice things and tricked the man into giving him something. And for that he received Naama’s leprosy.

“All is well” because God has already declared it; we’ve seen it in His Word, and we’ve received it thru His Son. So now when we declare it do so by Faith and not out of Greed (for what you think you’re owed, you just might get).