Summary: I suppose the term "man of God" means different things to different people. However, we have the account of an individual who was called a "man of God" and commanded to respond to a king's command. Because he was a man of God, certain characteristics marked his life.
“After the death of Ahab, Moab rebelled against Israel.
“Now Ahaziah fell through the lattice in his upper chamber in Samaria, and lay sick; so he sent messengers, telling them, ‘Go, inquire of Baal-zebub, the god of Ekron, whether I shall recover from this sickness.’ But the angel of the LORD said to Elijah the Tishbite, ‘Arise, go up to meet the messengers of the king of Samaria, and say to them, “Is it because there is no God in Israel that you are going to inquire of Baal-zebub, the god of Ekron? Now therefore thus says the LORD, You shall not come down from the bed to which you have gone up, but you shall surely die.”’ So Elijah went.
“The messengers returned to the king, and he said to them, ‘Why have you returned?’ And they said to him, ‘There came a man to meet us, and said to us, “Go back to the king who sent you, and say to him, Thus says the LORD, Is it because there is no God in Israel that you are sending to inquire of Baal-zebub, the god of Ekron? Therefore you shall not come down from the bed to which you have gone up, but you shall surely die.”’ He said to them, ‘What kind of man was he who came to meet you and told you these things?’ They answered him, ‘He wore a garment of hair, with a belt of leather about his waist.’ And he said, ‘It is Elijah the Tishbite.’
“Then the king sent to him a captain of fifty men with his fifty. He went up to Elijah, who was sitting on the top of a hill, and said to him, ‘O man of God, the king says, “Come down.”’ But Elijah answered the captain of fifty, ‘If I am a man of God, let fire come down from heaven and consume you and your fifty.’ Then fire came down from heaven and consumed him and his fifty.
“Again the king sent to him another captain of fifty men with his fifty. And he answered and said to him, ‘O man of God, this is the king’s order, “Come down quickly!”’ But Elijah answered them, ‘If I am a man of God, let fire come down from heaven and consume you and your fifty.’ Then the fire of God came down from heaven and consumed him and his fifty.
“Again the king sent the captain of a third fifty with his fifty. And the third captain of fifty went up and came and fell on his knees before Elijah and entreated him, ‘O man of God, please let my life, and the life of these fifty servants of yours, be precious in your sight. Behold, fire came down from heaven and consumed the two former captains of fifty men with their fifties, but now let my life be precious in your sight.’ Then the angel of the LORD said to Elijah, ‘Go down with him; do not be afraid of him.’ So he arose and went down with him to the king and said to him, ‘Thus says the LORD, “Because you have sent messengers to inquire of Baal-zebub, the god of Ekron—is it because there is no God in Israel to inquire of his word?—therefore you shall not come down from the bed to which you have gone up, but you shall surely die.”’
“So he died according to the word of the LORD that Elijah had spoken.”
Have you ever been challenged by someone questioning your commitment to the Risen Saviour? It seems rather common for people to say something along the lines, “If you were a real Christian, you would…” Whenever someone makes such a statement, they reveal that they hold a bifurcated view of the Faith. Their statement demonstrates that they are segregating the people of God into categories, they are creating a religious caste system. The world has a perception of what a Christian is, and that perception is almost always related to their own comfort. Their perception is coloured by their own desire to control others so that their own world won’t be disturbed.
Truthfully, the issue before us arises from the fact that we do want to be godly. Consequently, our perception is often as distorted as the perception held by those in the world. We focus on the external aspects of the Faith since that is relatively easy; however, in doing this, we are forgetting that God looks on the heart. Though we have heard David’s words, we forget the admonition he delivered to Solomon. “The LORD searches all hearts and understands every plan and thought” [1 CHRONICLES 28:9b].
We forget the words that God spoke through Jeremiah.
“I the LORD search the heart
and test the mind,