Muslims seem to think that they have an option when it comes to obeying Muhammad SAW. They mistakenly estimate obedience to him SAW as being admirable and rewardable, but as only being optional. They fail to realise that obedience to Muhammad SAW is obedience to Allah. And disobedience of Muhammad SAW is disobedience to Allah.

Safiyyah compiles a beautiful post highlighting the importance of Sunnah.