The necessity of studying the methodology of the Salaf and knowing what they were upon, just as one studies the Book and the Sunnah, and the harm of one who does not study that.

The Shaykh : ... Therefore, it is obligatory for everyone who wants to be upon this Salafi methodology, just as he studies the Book and the Sunnah; he must also study what the Salaf, the Companions, the Tabi'un, and those who followed them were upon; because they are the ones who transmitted this call to us in the correct manner. This example is before you: their distinction between ahad reports and mutawatir reports; they say that creed is not taken except from mutawatir reports. And they fell into very strange contradictions at times, and that was due to their distance from this Salafi methodology...