Ash-Shaykh Saalih al-Fawzaan, may Allaah preserve him, said:

“Indeed in this time there has appeared a people who say: “the matter is an issue of difference of opinion” , so we say: when there is ikhtilaaf the proof should be followed, we have not been requested to use the kilaaf of the people and the opinions of the people a source of worship rather we have been requested to use the proof as a source of worship… so it is waajib to return to the Book of Allaah and Sunnah of the Messenger. As for the one who chooses the opinion that coincides with his desires even if opposes the daleel then this person is misguided , he worships his own desire, as for the one who worships Allaah then he chooses that which is proof based from the Book of Allaah and Sunnah of the Messenger , alaihi as-salaatu was-salaam”.

Reference: His Sharh on Sharhus Sunnah, page 147-148, print: ar-Rushd.