In the name of allah, the Beneficent, the Merciful What is sin in Islam?

1.) The difference between a sin and a mistake,
2.) Shaytaan’s (Satan) role in the commission of a sin,
3.) If one becomes removed from Islam due to committing a sin, and
4.) The major sins.
The purpose of this essay is to provide concise answers to such inquiries, inSha’Allah.
Question: What is the difference between sin and mistakes? What role does Shaytaan, the accursed one, play in sin?

Fault means any action that takes place unintentionally and sin is with intention.

For example, Shaytaan put such ideas into the heart of Hazrat Adam (a.s.) to approach the tree. Adam did it and as a result, Allah sent him to the earth. Similarly, Hazrat Yunus (Jonah) committed a fault and he adopted that way prohibited to him according to the instruction of Allah. Allah says in the Holy Qur’an that it was Shaytaan who put the idea into Hazrat Adam and Hazrat Yunus (a.s.), so there is no doubt that Shaytaan can put these ideas into the hearts of the Nabiyeen to divert their attention from the right way. But the mistakes they commit are only according to the Hikmat of Allah. These mistakes are below the standards of the Nabiyeen, so we can not point it out that they took place according to the Order of Allah. We must say Shaytaan is responsible. All the good things take place from the Kindness of Allah while all of the bad things are due to Shaytaan. The awliya are not free from this was-wâs (evil whispers), but if this was-wâs happens to any wali, as soon as he realizes it, he busies himself in tawba (repentance). But on the other hand, the common people, when they commit a sin, they do not realize it and they do not feel guilty about it.
Sins are of three types:

1.