Thus the least that is expected of a believer is that he should be without these three things. So it is meant that he should make up his mind for this and talk to himself about this and keep his organs engaged in this.
In conclusion, one sees that there exists a distinct difference between sin and mistakes. One should distinguish between the two and be aware of what his or her niyyat (intention) is before proceeding with an action. The Holy Last Messenger (s.a.s.);
“Actions are but by intentions and every man will have but that which he intended.” It is best that one proceeds with the intention of pleasing Allah, and doing an action for Allah’s sake. Major sins are those sins in which a Muslim would never imagine of doing under any circumstances, but if committed, tawba would be performed immediately. One’s sins do not remove him or her from Islam unless he or she commits an act of kafir, unless their belief removes one from Islam.
Allah says: “If I were to punish everyone for their sins, then NOTHING would remain in existence.” The worst sin anyone could ever commit is to ascribe partners with Allah, and this is known as shirk.
The evil which man does is either by his nafs (the unruly self which causes man to act irreligiously and cause his own harm) or Shaytaan. Allah is not happy with evil or bad deeds, and good deeds make Allah happy. And good is done by the help of Allah, but Allah only helps who desires good and puts forth effort. May Allah guide us all and forgive the sins of the past and the present and protect us from future sins. Aameen!