You are quoting the scripture out of context, not understanding it correctly. When considered in its proper context, it has a different meaning than the one you have assigned to it. This is the full context:
Jeremiah 17:
5 Thus saith the Lord; Cursed be the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the Lord.
6 For he shall be like the heath in the desert, and shall not see when good cometh; but shall inhabit the parched places in the wilderness, in a salt land and not inhabited.
7 Blessed is the man that trusteth in the Lord, and whose hope the Lord is.
8 For he shall be as a tree planted by the waters, and that spreadeth out her roots by the river, and shall not see when heat cometh, but her leaf shall be green; and shall not be careful in the year of drought, neither shall cease from yielding fruit.
9 The heart {that is to say, the heart of the wicked man, as discussed above, not of the righteous man} is deceitful above all things, and desperately wicked: who can know it?
To sum it up, it is the heart of the evil and the wicked, those whose hearts "depart from the Lord," that is wicked and deceitful, and as a parched ground, because the Spirit of God has departed from it, and it is incapable of receiving the inspiration of heaven. By contrast, the heart of the righteous is full of light and the inspiration of heaven, as a "watered garden" (Isa. 58: 11; Jer. 31:12); and is not deceitful, but can discern between truth and falsehood, right and wrong.
zerinus
Continued . . . /