This indeed is the greatest type of Shirk, associating others with Allah in worship. It is recorded in the Two Sahihs that `Abdullah bin Mas`ud said, "I said, `O Allah's Messenger! What is the greatest sin' He said, (أَنْ تَجْعَلَ للهِ نِدًّا وَهُوَ خَلَقَك That you call a rival to Allah while He alone created you.)''
Al-Hasan Al-Basri commented on Allah's statement, (And most of them believe not in Allah except that they attribute partners unto Him.) "This is the hypocrite; if he performs good deeds, he does so to show off with the people, and he is an idolator while doing this.''
Al-Hasan was referring to Allah's statement, (Verily, the hypocrites seek to deceive Allah, but it is He Who deceives them. And when they stand up for As-Salah, they stand with laziness and to be seen of men, and they do not remember Allah but little.) [4:142]
There is another type of hidden Shirk that most people are unaware of. Hammad bin Salamah narrated that `Asim bin Abi An-Najud said that `Urwah said, "Hudhayfah visited an ill man and saw a rope tied around his arm, so he ripped it off while reciting, (And most of them believe not in Allah except that they attribute partners unto Him.)
In a Hadith, from Ibn `Umar collected by At-Tirmidhi who said it was Hasan, the Prophet said, (He who swears by other than Allah, commits Shirk.)
Imam Ahmad, Abu Dawud and other scholars of Hadith narrated that `Abdullah bin Mas`ud said that the Messenger of Allah said, (إِنَّ الرُّقَى وَالتَّمَائِمَ وَالتِّوَلَةَ شِرْك Verily, Ar-Ruqa, At-Tama'im and At-Tiwalah are all acts of Shirk.)
In another narration collected by Ahmad and Abu Dawud, the Prophet said, (Verily, At-Tiyarah ﴿omen﴾ is Shirk; everyone might feel a glimpse of it, but Allah dissipates it with Tawakkul.)''
Yusuf Ali Explanation:
Even if people profess a nominal faith in Allah, they corrupt it by believing in other things as if they were Allah's partners, or had some share in the shaping of the world's destinies! In some circles, it is idolatry, the worship of stocks and stones. In others, it is Christolatry and Mariolatry, or the deification of heroes and men of renown. In others it is the powers of Nature or of Life, or of the human intellect personified in Science or Art or invention, and this is the more common form of modern idolatry. Others again worship mystery, or imaginary powers of good or even evil: greed and fear are mixed up with these forms of worship. Islam calls us to worship Allah, the One True God, and Him only.
Javed Ahmad Ghamidi Explanation: