SIN = Thoughts, words and deeds that have their Source In Negativity and many there are that are full of its darkness, that's fuelled by their instinctual pride, vanity, envy, selfish ambition, lust, desire for creature comforts and/or fear for survival.
People think, that just because they say they believe and can memorise and recite scriptures like a parrot, they are saved. How naive and deceived they are, by their own, sinful instinctual nature and its characteristic pride, vanity and selfish ambition (ego), that makes you not only your own worst enemy, but the enemy of God (absolute love)
Brood of vipers! How can you, being evil (dark & negative), speak good (virtuous) things? For out of the abundance of the heart the mouth speaks.Matthew 12:34
But He turned and said to Peter, "Get behind Me, Satan! You are an offense to Me, for you are not mindful of the things of God, but the things of men."Matthew 16:23
Those who have truly walked the narrow path and fully overcome their sinful, instinctual nature, are perfect gentlemen and gentlewomen (saints), who have surrendered absolutely to the nature of absolute love, the light of which governs and rules their every thought, word and deed, according to true love's characteristic, majestic virtuousness (righteousness).
ABSOLUTE assertiveness (boldness), caring, charity, cleanliness, commitment, compassion, confidence, consideration, cooperation, courage, courtesy, creativity, detachment, determination, dignity, diligence, enthusiasm, excellence, flexibility, forgiveness, friendliness, generosity, gentleness, gracefulness, graciousness, helpfulness, holiness, honesty, honor, humility, idealism, integrity, joyfulness, justice, kindness, loyalty, moderation, modesty, nobility, orderliness, patience, peacefulness, perseverance, purposefulness, reliability, respect, responsibility, self-discipline, service, tact, thankfulness, tolerance, trust, trustworthiness, truthfulness, understanding, unity and wisdom.
"Brood of vipers! Who warned you to flee from the wrath to come? (that was me) Therefore bear fruits worthy of repentance, and do not think to say to yourselves, ‘We have Abraham as our father.’ For I say to you that God is able to raise up children to Abraham from these stones. And even now the axe is laid to the root of the trees. Therefore every tree which does not bear good fruit is cut down and thrown into the fire."Matthew 3:7-10