So, just as we should avoid Shirk we should avoid bidah. So avoiding
Shirk and singling Allah alone with all worship is the meaning of Laa
Ilaha Illallah” (i.e. none has the right to be worshipped in truth
except Allah) and the meaning of Muhammad is the Messenger of Allah is
to abandon Bidah because the messenger is the one, who brought us
clarification of the truth and the religion. Thus, we should worship
Allah upon the path of the Messenger.
Therefore, He didn’t leave anything good except that He made it clear to
us; and He didn’t leave anything evil except that he made it clear to
us. Thus, among the greatest causes for the Ummahs salvation is clinging
to the ‘Aqeedah and Tawheed, its avoiding Shirk and bidah.