Ibn Taymiyah once wrote:
I have never seen anything which nourishes the intellect and soul, preserves the body, and ensures happiness more than consistently reading from Allah's Book.
[Majmoo' al-Fatawa 7/493]
Never ask a Sufi about Shirk and Bid'ah.
Never ask a Takfiri about the conditions of Takfir.
Never ask an Ikhwani about al-wala' wa'l-bara'.
Never ask a Khariji about his scholars.
Never ask an Ash'ari about Allah and His attributes.
Always ask a Salafi about all these.