What is the Muslim definition and concept of sin? Is sin a state of being? Is sin an action? Can one sin accidentally? Can one sin by thought or only by deed?
All these answers are missing something fundamental: In Islam, a sin is any act of disobedience against the commands of Allah, which may entail punishment in the Hereafter.
In contrast, a good deed (if done sincerely and accepted by the Almighty Allah) will entail reward in the Hereafter.
The crucial piece is that sins vs. good deeds are weighed, and the human being is judged on the difference; that determines where you end up.
There's a lot of discussion around major vs. minor sins, unintentional vs. intentional sins, etc. -- for the purposes of this question, I would only add that no person will bear the burden of another's sin, as is mentioned in this ayah of Qur'an:
Say, "Is it other than Allah I should desire as a lord while He is the Lord of all things? And every soul earns not [blame] except against itself, and no bearer of burdens will bear the burden of another. Then to your Lord is your return, and He will inform you concerning that over which you used to differ." Surah Al-An'aam, verse 164
It shoudl be implicit from my answer, but just to explicitly answer your questions:
- Sin is not a state of being (no "Original Sin")
- Sin is an action that you commit
- Sins can be committed accidentally, although you are not held accountable for them in that case
- You can think of committing sins, but you are only held accountable for actions, not thoughts.
A sin in Islam is the act of disobeying Allah's commands intentionally. In Islam there are two kinds of sin and they are:
- minor sin
- Major sin
Minor sin like, not lowering your gaze, not dressing properly etc.
Major sins like, shirk/associating something with Allah ,this sin is not forgiven by Allah, this the ultimate sin, stealing etc.
No a sin is not a state of being, as Dynamic said it is more of a concept.
Your sin is forgiven as Dynamic mentioned if
it is not your intention
it was an accident
yes one can sin accidentally, and without even knowing it. Regarding thought, that is one of the important aspect of tolerance and moderation in Islam. What one’s own nafs (self) says has been forgiven by Allaah,
The Prophet (peace and blessings of Allaah be upon him) said: “Allaah has forgiven my ummah for thoughts that cross their minds, so long as they do not speak of them or act upon them.” (Narrated by Muslim, 127)
Your sin is also forgiven, whether it was by intention or not, by doing (Tawbah) Repentance, which is seeking forgiveness making a intention not to go back to the sin and moving on, not letting the sin keep you down.
Sin (معصية) literally in Arabic means disobeying.
Disobeying any command of God
Doing any action, think, talk, word,... that God is not satisfied with it.
Not living as God wants.
Sin may not entail punishment in the Hereafter. it depends on spiritual level of Muslim. if he has high level leaving recommended actions (Mustahab) is considered sin for him. for example the sin word is used about prophet (واستغفر لذنبک) which not mean the actions having punishment.