This is the translation of a set of tapes from the famous Silsilah al-Hudá wa-al-Nūr series by Imām al-Albānī. He gives an extremely beneficial lecture establishing the foundational principles of Salafīyyah. The conclusion of the talk of Shaykh Nāṣir explains the foundations of Salafīyyah. Here, there is the addition of some doubts which the Shaykh answers in a very astute way.