Presumptuous sins are deliberate acts of disobedience, rebellion, and defiance against God’s authority and moral standards. They reflect a hardened heart, and a refusal to submit to God’s will.  Throughout the Bible, these sins are condemned as serious offenses that carry severe consequences, both in this life and in the life to come.  God’s grace and mercy are available to those who humble themselves, confess their sins, and turn to him in genuine repentance.