God's way is beyond man's wisdom

Jeremiah 42:1-22
Then all the army officers, including Johanan son of Kareah and Jezaniah son of Hoshaiah, approached Jermiah "Pray that the Lord your God will tell us where we should go and what we should do."
Whether it is favorable or unfavorable, we will obey the Lord our God, to whom we are sending you, so that it will go well with us, for we will obey the Lordour God.
Ten days later the word of the Lord came to Jeremiah. ‘If you stay in this land, I will build you up and not tear you down; I will plant you and not uproot you, for I have relented concerning the disaster I have inflicted on you. Do not be afraid of the king of Babylon, whom you now fear. Do not be afraid of him, declares the Lord, for I am with you and will save you and deliver you from his hands.'
If you are determined to go to Egypt and you do go to settle there, then the sword you fear will overtake you there, and the famine you dread will follow you into Egypt, and there you will die.
For all the people's declared willingness to obey God's word, when the message comes telling them to stay put, they disobey. 
Why?
They do not really listen to the word of the Lord but seek the word of God to approve their mind. If God's word does not meet their expect they disobey God's word, they take their own mind and walk on their way.
Folllish man do not really seek God but walk on their own way, so they will get the downfall for what they have done.
How?
Pray to the Lord with all my heart and all my mind, listen to the word of God instead of man's idea.