Shirk (Polytheism - To associate anyone or anything with Allah)

The first of the Greater Sins is to associate anyone or anything with Allah. That is to attribute partners to Allah. Regarding Shirk we have received clear traditions from the Holy Prophet (s.a.w.s.) as well as Hazrat Ali (a.s.), Imam Ja'far as-Sadiq (a.s.), Imam al-Kazim (a.s.), Imam Reza (a.s.) and Imam Jawad (a.s.). 

Imam Ja'far as-Sadiq (a.s.) says:
"The greatest of the Greater Sins is to attribute partners to Allah."
(Wasaaelush Shia) 

The following verse of the Holy Quran asserts:
"Surely Allah does not forgive that anything should be associated with him, and forgives what is besides that to whomsoever He pleases, and whoever associates anything with Allah, he devises indeed a great sin."
(Surah Nisa 4:48) 

It means that whoever dies as a polytheist, there is no chance of his salvation. Although Allah may forgive any of those who have committed any other sin. Allah says:
"Surely whoever associates (others) with Allah, then Allah has forbidden to him the garden, and his abode is the fire; and there shall be no helpers for the unjust."
(Surah Maidah 5:72) 

Also the Holy Quran states:
"Do not associate aught with Allah; most surely polytheism is a grievous inequity."
(Surah Luqman 31:13). 

"And whoever associates anything with Allah, he devises indeed a great sin."
(Surah Nisa 4:48) 

Every Muslim knows fully well that Shirk is a Greater Sin. So it does not seem necessary to quote the Quranic ayats and the traditions of Masoomeen (a.s.) in this regard. However, since it is important to understand the true meaning of Shirk we shall quote the relevant statements in order that people may keep aloof from this infamy. The Holy Quran says,
"And worship Allah and do not associate anything with Him."
(Surah Nisa 4:36)

Mushrik (Polythiest) is the opposite of Muwahhid (Monotheist). Tawheed is the primary pillar of faith. It has various aspects. In the same way Shirk also consists of different types:
1) Tawheed and Shirk with regard to the Essence of Allah
2) Tawheed and Shirk with regard to the Attributes of Allah
3) Tawheed and Shirk in actions
4) Tawheed and Shirk in Obedience
5) Tawheed and Shirk in worship
May Allah provide us the Tawfeeq to discuss these different aspects in detail