A ‘Person of Opinion’ uses his/her own judgement to decide what is best for him/her. This is bad if ALLAH, Most High, and His Messenger, Prophet Muhammad, peace be upon him, have given us guidance already. This guidance is in the form of the Qur’an and Sunnah.
“O you who have believed, obey ALLAH and obey the Messenger and do not invalidate your deeds.” (Qur’an, Muhammad 47:33)
Without that guidance we would wander the world in blindness. Such are the disbelievers.
“Indeed, for those who do not believe in the Hereafter, We have made pleasing to them their deeds, so they wander blindly.” (Qur’an An-Naml 27:4)
However, there are Muslims who wander the world in a similar manner of blindness, precisely when they decide to not adhere to the Qur’an and Sunnah and decide to use their own opinions on matters that necessitate guidance.
They use their own Opinions for three main reasons: