A person becomes a Muslim by testifying to the truth of the statements: There is none worthy of worship except Allah and Muhammad is the Messenger of Allah.

The Testimony of Faith is the statement, "La ilaha illa Allah wa Muhammad Rasul-ullah", meaning "There is no deity worthy of being worship except God (Allah), and Muhammad is the Messenger of God". The Declaration of Faith is more than just a statement; it must be shown with one's actions. To convert to the faith of Islam, a person has to say this statement.

It is important to understand the meaning and the implications of the second part of the testimony of faith as well. Indeed, sometimes one strays from the Straight Path and from Islam itself because he is not implementing the second part of the declaration of faith properly.

The testimony of faith is saying with conviction, “La ilaha illa Allah, Muhammadur rasoolu Allah.” 

 The Testimony of Faith is by far the most importantaspect of the religion of Islam, upon which the whole religion is built. Thislesson gives insight into its importance and meaning.

These are the testimonies of Faith and Tawheed,that no one has the right to be worshipped but Allah and that Muhammad is His slave and messenger.