God's words never failed and never changed

1 King 13:1-34
The Lord sent a prophet to Bethel for warning Jeroboam,  "A son named Josiah will be born to the house of David On you he will sacrifice the priests of the high places who now make offerings here, and human bones will be burned on you." That same day the man of god gave a sign:"The altar will be split apart and the ashes on it will be poured out."
The king want to seize the prophet,  But the hand he stretched out to ward the man shrived up, so that he could not pull it back. Also the altar was split apart and its ashes poured out according to the sign given by the man of God by the word of the Lord.
But Jeroboam did not change his evil ways, let to its downfall and to its destruction from the face of the earth.
A old prophet was lying to the prophet bring him back to his house,  he said to the prophet, " an angle said to me by the word of the Lord". So the prophet believed him. And after the prophet eating and drinking at the house of the old man, who went on his way, a lion met him on the road and killed him, and his body was thrown don on the road, with both the donkey and the lion standing beside the body.
Why?
The words of the Lord never changed, even the angle say anything would not change the command of the Lord has told us.
Jeroboam is neck stick king, even the Lord sent a prophet to warn him, and did miraculous signs before him.
Identify the truth depend on the word of the Lord.
The prophet's death is a sign to Jeroboam and Israel of the severity with which God deals with disobedience.
How?
Don't ignore the warning of the Lord, blessing is one who obey the word of the Lord.
God's words never failed and never changed