The Catholic Church traditionally identifies six sins against the Holy Spirit, which are considered particularly grave due to their nature of rejecting God's grace and resisting the work of the Holy Spirit in the soul. These sins are:
Presumption: This sin involves presuming upon God's mercy without repentance or contrition, essentially taking forgiveness for granted without genuine conversion.
Despair: Despair is the opposite extreme of presumption, where one believes that their sins are beyond God's forgiveness and mercy, leading to a refusal to seek reconciliation with God.
Resisting the Known Truth: This sin involves willfully rejecting or refusing to accept the truths of the faith that have been revealed by God and taught by the Church.
Envy of Another's Spiritual Good: This sin is the resentment or jealousy towards another person's spiritual growth, blessings, or gifts from God, rather than rejoicing in their spiritual well-being.
Obstinacy in Sin: Also known as final impenitence, this is a deliberate persistence in sin and a refusal to repent or seek reconciliation with God, even at the end of one's life.
Impugning the Known Truth: This sin involves maliciously opposing and speaking against the known truths of the faith, such as denying or blaspheming against the Holy Spirit, which Jesus warns is an unforgivable sin (Mark 3:29).
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