One who takes his responsibility for his deeds

1 Kings 20:35-43
A son of the prophets - Elijah, has the power of the Lord.
He disguised himself and said the king Israel a story about himself. "That is your sentence," the king of Israel said "You have pronounced it yourself."
Then the prophet quickly removed the headband from his eyes, and the king of Israel recognized him as one of the prophets. He said to the king, "This is what the Lord says:' You have set free a man I had determined should die. Therefore it is your life for his life, your people for his people.'"
Why?
The one who didn't obey the word of the Lord so he was killed by the lion.
If this man won't disguised himself the king will recognized him soon and won't says the words from his mouth. The Lord wanted Ahab said the consequence about himself from his mouth.
It is unreasonable to release biggest enemy of the country, and Aram,Ban-Hadad, was defeated by the Lord.
We have to take responsibility for our behavior when we presence before the Lord at that day.
How?
As your days, so shall your strength be. (Deut 33:25) 
Obey the words of the Lord is our peace and safety.