Believe.

Believe..." In this regard, Surah Muhammad, No.47, verse 17 says: "And those who avail of the guidance, He adds unto them guidance..." And, Surah Al-Fath No.48 verse 4 says: "... that they might add further faith to their faith…." However, disbelief, in some heavenly Books and some prophets is the same as disbelief in all. "...

"Verily those who believed, then disbelieved, again believed, and again disbelieved, then increased in (their) disbelief, Allah will not forgive them, nor will He guide them to the (right) way." Formerly a verse similar in meaning to this holy verse was detailed, saying that the repentance of such persons is not accepted and they are the real misguided ones.

Also, Surah 'Ale-Imran, No.3 Verse 90 in this field says: "Verily those who disbelieve after their belief, then increase in infidelity; their repentance will never be accepted; and these are they who are astray." There are some people who change their features every day. This is either for the lack of research in Truth and religion, or it is a plot in order to weaken the belief of the believers.

Surah 'Ale-Imran, No.3 Verse 72 also manifests this plan by stating that they believed at the opening of (the day, and disbelieved at the end of it, with the purpose that they might weaken the Muslims in their Faith. The clear example of the content of this verse is the persons such as Shabth-ibn-Rib'i whose instability can be, illustrated as follows: He became Muslim but, after the death of the Prophet (S), he disbelieved. After that, he repented and joined to the adherents of Ali (as).

Later, he changed to be the commander of Kharijites. Again he repented and went on to be as an adherent of Imam Hassan (as) and Imam Husayn (as). He wrote an invitation letter to Imam Husayn (as) but he showed his disloyalty to Muslim-ibn-' Aghil in Kufa (an-ancient city, in Mesopotamia). He accepted to be the commander of Yazid's troop in Karbala, and built a mosque in Kufa as a sign of gratitude for the slain of Imam Husayn (as).