Exegesis can make more sense out of what you seem to like using as a club to hit peopled over the head with....
Jeremiah's love of his life became unfaithful to him.
She went after the pagan cult sex rituals and left him.
She used to come around at times to torment him.
For... the sight of her he kept breaking his heart...
When the Lord gave Jeremiah the words? "the heart is deceitful and desperately wicked."
It was to explain his situation, and why he was weeping so much..
That verse could also be read...
The deceitful heart is above all things, and desperately wicked: who can know it?
The Lord was consoling Jeremiah as to why the love of his life had turned against him..
And, also why the people of Israel he loved were turning against God.
Its all about context.
Its not to be used as a club like you take pleasure in doing with just anyone.
John 1:41-47
He first found his own brother Simon, and said to him, “We have found the Messiah”
(which is translated, the Christ). And he brought him to Jesus.
Now when Jesus looked at him, He said, “You are Simon the son of Jonah.
You shall be called Cephas” (which is translated, A Stone).
The following day Jesus wanted to go to Galilee, and He found Philip and said
to him, “Follow Me.”
Now Philip was from Bethsaida, the city of Andrew and Peter. Philip found Nathanael
and said to him, “We have found Him of whom Moses in the law, and also the prophets,
wrote—Jesus of Nazareth, the son of Joseph.”
And Nathanael said to him, “Can anything good come out of Nazareth?”
Philip said to him, “Come and see.”
Jesus saw Nathanael coming toward Him, and said of him,
“Behold, an Israelite indeed, in whom is no deceit!”
In Christ.....