There has been much speech these days about the difference between aqidah (creed) and manhaj (methodology), until the people have begun to say, "So and so's aqidah is the aqidah of Ahl us-Sunnah wal-Jamaa'ah" or of Salafiyyah, however his manhaj is not the manhaj of Ahl us-Sunnah wal-Jamaa'ah. So for example, they say this speech about some of those ascribing to Jamaa'at ut-Tableegh, or al-Ikhwan al-Muslimeen, or some of the other groups. So is there any principle by which can know the manhaj of Ahl us-Sunnah wal-Jamaa'ah or Salafiyyah. And is this separation between aqidah and manhaj correct?

To which they replied:

The aqidah of a Muslim and his manhaj are a single thing, and it is:

Whatever a person believes in his heart, and speak with by his tongue, and acts upon with his limbs (in relation to) the wahdaaniyyah (uniqueness) of Allaah, the Sublime and Exalted, in Ruboobiyyah (lordship over the universe), an Ilaahiyyah (right to be worshipped alone), and al-Asmaa was-Sifaat (names and attributes), and singling Him out in worship, and holding fast to His Sharee'ah in speech, action and belief, upon what has come in the Book of Allaah and the Sunnah of His Messenger (sallallaahu alayhi wasallam) - and what the Salaf of this Ummah and its (leading) Imaams traversed upon.

And with that it is known that there is no difference between aqidah and manhaj, rather they are both a single thing, it is obligatory that a Muslim adhere to it, and remain steadfast upon it.

Source: Fataawaa al-Lajnah ad-Daa'imah (2/40-41).