Defending the Religion is from Good Character, Good Manners with Allaah, Subhanahu wa Ta’aala, and from Wanting Good for the Muslims
Shaikh Muhammad ibn Saalih al-‘Uthaimeen (rahimahullaah) said:
Accepting Allaah’s reports [Qur`an and Sunnah] and believing them means that one does not doubt them or waver in his affirmation of what Allaah, Subhanahu wa Ta’aala, says. This is because what Allaah Ta’aala says only comes from Knowledge, while He is the Most Truthful in speech.
Allaah, Ta’ala, has said about Himself:
And who is more truthful in speech than Allaah? [Soorah an-Nisaa`, ayah 87]
To truly believe in what Allaah says necessitates that one puts his trust in His reports, [url=http://www.salafitalk.net/st/viewmessages.cfm?Forum=9&Topic=12352]defends them[/url], and struggles by way of them, and he does not allow the entrance of any doubt or confusion over what Allaah, Subhanahu wa Ta’aala, and His Messenger (salallaahu ‘alayhi wa sallam) reported.
When someone takes on this kind of character, it enables him to repel the doubts cast by those who speak with ulterior motives about the reports of Allaah and His Messenger (salallaahu ‘alayhi wa sallam), whether they be from the Muslims who have introduced new affairs into the Religion, or from the non-Muslims who try to cast doubts into the hearts of the Muslims.
Ibn Taymeeyah (rahimahullaah) relayed:
It was once said to Imam Ahmad (rahimahullaah): If a man fasts, prays, and makes ‘itikaff, is that more beloved to you or that he speaks out against innovators? He replied: If he fasts and prays and makes ‘itikaaf, then that is for himself. But if he speaks out against innovators, this is for the Muslims. This is better. [Majmoo’-ul-Fataawaa` (28/231)]
Source: Shaikh Muhammad ibn Salih al-‘Uthaimeen’s highly beneficial book [url=http://www.salafitalk.net/st//viewmessages.cfm?Forum=6&Topic=6007]Upright Moral Character – A Concise Guide to Attaining Dignified Islaamic Character[/url]