Contradiction with Jeremiah 17:9
While Hebrews 10:22 encourages drawing near with a true heart, Jeremiah 17:9 says the heart is deceitful above all things, suggesting a natural contradiction in human nature.
Jeremiah 17:9: The heart [is] deceitful above all [things], and desperately wicked: who can know it?
Contradiction with Romans 7:18
Hebrews 10:22 emphasizes purity and assurance, but Romans 7:18 speaks to the human inability to do good on one's own, highlighting human weaknesses.
Romans 7:18: For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but [how] to perform that which is good I find not.
Contradiction with Proverbs 28:26
Contrasting the confidence in drawing near to God in Hebrews 10:22, this verse warns that trusting one's own heart can be foolish, suggesting doubt rather than assurance.
Proverbs 28:26: He that trusteth in his own heart is a fool: but whoso walketh wisely, he shall be delivered.
Contradiction with Matthew 15:19
Hebrews 10:22 talks about a clean heart, but Matthew 15:19 lists evil thoughts coming from the heart, which seems contradictory.
Matthew 15:19: For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:
Contradiction with Genesis 6:5
The purity of heart encouraged in Hebrews 10:22 is contrasted by Genesis 6:5, where every imagination of human hearts is evil.
Genesis 6:5: And GOD saw that the wickedness of man [was] great in the earth, and [that] every imagination of the thoughts of his heart [was] only evil continually. [every...: or, the whole imagination: the Hebrew word signifieth not only the imagination, but also the purposes and desires] [continually: Heb. every day]