It is explained that one should take a moderate approach in worship.

The Shaykh : Worshiping Allah is not by emotion or by desire; worshiping Allah is by following the Shari'ah. For this reason, when three men came to the wives of the Prophet (peace and blessings be upon him) asking them about his private conduct—meaning how he conducted himself—the women informed them of what the Messenger used to do (peace and blessings be upon him). They found the work to be light and said, "This is a light amount of work; we will do more, because Allah has forgiven the Prophet (peace and blessings be upon him) his past and future sins, so he settles for less work. But as for us, that has not been guaranteed for us, so we will increase our work." What did some of them say? One said, "I will not marry women." The second said, "I will fast and not break my fast." The third said, "I will stand in prayer and not sleep." This reached the Prophet (peace and blessings be upon him), and he publicly rebuked them; he gave a sermon and rebuked them, saying: Listen, my brother. He rebuked them, even though what drove them to this work was not a desire for good or an increase in righteous deeds, but the Shari'ah is not by desire. The Shari'ah is guidance. If the Prophet (peace and blessings be upon him) and the Rightly Guided Caliphs were upon it, then it is upon the eyes and heads. Listen, my brother, if you see that the Shari'ah or worship is guidance and not desire. Are these people who want to begin i'tikaf (spiritual retreat in the mosque) on the eleventh day more fearful of Allah than the Messenger of Allah?
The student: No.

The Shaykh : Answer me?
The student: No?

The Shaykh : Or more guided than the Messenger of Allah, or more knowledgeable of what Allah loves than the Messenger of Allah? No, and they acknowledge this.