Religions

Bahá'í
Main article: Bahá'í views on sin
In the Bahá'í Faith, humans are considered naturally good (perfect), fundamentally spiritual beings. Human beings were created because of God's immeasurable love. However, the Bahá'í teachings compare the human heart to a mirror, which, if turned away from the light of the sun (i.e. God), is incapable of receiving God's love.
Buddhism
Main article: Buddhist views on sin
Buddhism does not recognize the idea behind sin, but believes in the principle of karma, whereby suffering is the inevitable consequence of greed, anger, and delusion (known as the Three poisons).[11] While there is no direct Buddhist equivalent of the Abrahamic concept of sin, wrongdoing is recognized in Buddhism. The concept of Buddhist ethics is consequentialist in nature and is not based upon duty towards any deity.
Christianity
Main articles: Hamartiology and Christian views on sin
See also: Christian views on the Old Covenant and Seven deadly sins
In Western Christianity, sin is believed to alienate the sinner from God even though He has extreme love for men. It has damaged, and completely severed, the relationship of humanity to God. That relationship can only be restored through acceptance of Jesus Christ and his death on the cross as a substitutionary sacrifice for humanity's sin. Humanity was destined for life with God when Adam disobeyed God. The Bible in John 3:16 says "For God so loved the world that He gave His one and only begotten Son, so that whoever believes will not perish, but have everlasting life."
In Eastern Christianity, sin is viewed in terms of its effects on relationships, both among people and between people and God. Sin is seen as the refusal to follow God's plan, and the desire to be "like God" (Genesis 3:5) and thus in direct opposition to God's will (see the account of Adam and Eve in the Book of Genesis).
Original sin is a Western concept which states that sin entered the human world through Adam and Eve's sin in the Garden of Eden, and that human beings have since lived with the consequences of this first sin.[12]
One concept of sin deals with things that exist on Earth, but not in Heaven. Food, for example, while a necessary good for the (health of the temporal) body, is not of (eternal) transcendental living and therefore its excessive savoring is considered a sin.[7] The unforgivable sin (or eternal sin) is a sin that can never be forgiven. Matthew 12 30-32 : “Whoever is not with me is against me, and whoever does not gather with me scatters. 31 And so I tell you, every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven. 32 Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come.
In Catholic Christianity sins are classified into grave sins called mortal sins and pardonable sins called venial sin. Grave sins cause one to lose heaven unless the sinner repents and pardonable sins require some sort of penance either on Earth or in Purgatory.[13]
Jesus was said to have paid double for the complete mass of sins past, present, and to come in future. Even inevitable sin from our weakness has already been cleansed.
The Lamb of God was and is God Himself and therefore sinless. In the Old Testament, Leviticus (Specifically, 16:21) states that ‘the laying on of hands’ was the action that the High Priest Aaron was ordered to do yearly by God to take sins of Israel's nation onto a spotless young lamb.
Hinduism
In Hinduism, the term sin (pāpa in Sanskrit) is often used to describe actions that create negative karma by violating moral and ethical codes, which automatically brings negative consequences. This is similar to Abrahamic sin in the sense that pāpa is considered a crime against the laws of God, which is known as (1) Dharma, or moral order, and (2) one's own self, but another term apradha is used for grave offenses.
Islam
Main article: Islamic views on sin
Muslims see sin (dhanb, thanb ذنب) as anything that goes against the commands of God (Allah). Islam teaches that sin is an act and not a state of being. The Qur'an teaches that "the soul is certainly prone to evil, unless the Lord does bestow His Mercy" and that even the prophets do not absolve themselves of the blame.[Quran 12:53] It is believed that Iblis (Satan) has a significant role in tempting humankind towards sin.
In Islam, there are several gradations of sin:
sayyia, khatia: mistakes (Suras 7:168; 17:31; 40:45; 47:19 48:2)
itada, junah, dhanb: immorality (Suras 2:190,229; 17:17 33:55)
haraam: transgressions (Suras 5:4; 6:146)
ithm, dhulam, fujur, su, fasad, fisk, kufr: wickedness and depravity (Suras 2:99, 205; 4:50, 112, 123, 136; 12:79; 38:62; 82:14)
shirk: ascribing a partner to God; idolatry and polytheism (Sura 4:48)
One may sincerely repent to God for the wrongs committed and seek forgiveness, as stated in the Quran, "Our Lord! Forgive us our sins, remove from us our iniquities, and take to Yourself our souls in the company of the righteous." (Al-Imran.193/ 3.193).
"Say Oh my slaves who have transgressed against their own souls despair not of the mercy of God, verily He forgives all sins, verily He is the oft-forgiving, most merciful" (Al-Zumar)
Judaism
Main article: Jewish views on sin
Judaism regards the violation of any of the 613 commandments as a sin. Judaism teaches that sin is an act, but one has an inclination to do evil "from his youth".(Genesis 8:21) Sin furthermore has many classifications and degrees. Some sins are punishable with death by the court, others with death by heaven, others with lashes, and others without such punishment, but not without consequence. Sins can also be by error and negligence or with willful intent. When the Temple yet stood in Jerusalem, people would offer sacrifices for their misdeeds. With some exceptions, sin offerings were brought for a sin punishable by death when done with willful intent, but committed by mistake. All sin has a consequence. The righteous suffer their sins in this world and receive their reward in the world to come. The wicked cannot correct their sins in this world and hence do not suffer them here, but in gehinom (hell). If they have not become completely corrupted, they repent in hell and thereafter join the righteous. The very evil do not repent even at the gates of hell. Such people prosper in this world to receive their reward for any good deed, but cannot be cleansed by and hence cannot leave gehinom, because they don't or can't repent. This world can therefore seem unjust where the righteous suffer, while the wicked prosper. Many great thinkers have contemplated this, but God's justice is long, precise and just.
Shinto
Evil deeds fall into two categories in Shinto: amatsu tsumi, "the most pernicious crimes of all", and kunitsu tsumi, "more commonly called misdemeanors".[14]