Personal attitude is more important and speak the law

Jeremiah 7:21-34
God did not ask just give them commands about burnt offerings and sacrifices, but gave them this command: obey me, and I will be your God and you will be my people. Walk in obedience to all I command you, that it may go well with you. But they did not listen or pay attention.
Therefore say to them, 'This is the nation that has not obeyed the Lord its God or responded to correction. Truth has perished; it has vanished from their lips.
Security and well-being rest on obedience to God.
Why?
God do not like burnt offerings and sacrifices, instead God like his people obey him, walk in  obedience to all God command. So the truth and justice are lost in people of Judah. The desolation was came to them.
They must cut off their hair : either in mourning, or as a sign that they are no longer pledged to God.
How?
In stead of going to the church, God like us fear God and doing good things. Personal attitude is more important and speak the law.