With their speech, believers try both to live according to the morality expounded in the Qur'an, as best as they can, as well as encourage others to live a moral life. That is because, in the Qur'an, they are advised that they are responsible for calling others to behave well, enjoining what is right and forbidding what is wrong:
Let there be a community among you who call to the good, and enjoin the right, and forbid the wrong. They are the ones who have success.
As this verse commands, Muslims must try to direct both one another and other people towards the morality which Allah approves. In the Qur'an, the faithful are instructed to speak "the finest of words." Because of this, the faithful speak using their intelligence and their conscience in the best possible way, and try to find the words which will be most useful for the people they are talking to. Knowing that others' lack of knowledge or ignorance comes from their distance from the Qur'an, they approach them by a way of speaking filled with compassion and mercy. They do not forget that, before they themselves learned the morality of the Qur'an, they were prone to incorrect behavior or that they had been able to arrive at moral perfection only because of Allah's compassion.
In addition, while explaining the religion, they never speak in a way that is forceful. As is outlined in this verse of the Qur'an, "So remind them! You are only a reminder. You are not in control of them." (Surat al-Ghashiyya: 21-22), the responsibility of the Muslims is only to give advice with the most beautiful language and speak in the knowledge that the only One Who ultimately offers guidance is Allah. They attempt to speak in "the kindest way," as they are told to do in another verse of the Qur'an:
"Call to the way of your Lord with wisdom and fair admonition, and argue with them in the kindest way."
As they are told in another verse "… warn them and speak to them with words that take effect." (Surat an-Nisa': 63), Muslims call on the consciences of those who have fallen into error, but do so in a straightforward manner, using unambiguous and effective words. They never speak out of conceit or feelings of superiority. They use a manner of speaking which is measured, always respectful, and approach those they advise with points that are both positive and constructive. They hold conversations which will attract these people to their intelligence and sincerity. By warning others to abandon the state of error in which they find themselves and telling them about the afterlife, the Day of Judgment and Allah's hearing every word spoken and seeing every act in order to direct them towards a better way of behaving, they invite them to heed Allah.
As well, though the faithful may be truly sincere in their efforts, the opposite party may not be able to understand what has been explained, or may simply not wish to accept it. Nevertheless, the faithful never fall into hopelessness or despair. Their duty is to carry out the task of communicating Allah's message, described by Allah as a form of worship, in the best way possible; the responsibility for following or not following the advice given is solely upon those spoken to. The believers never forget that guidance is from Allah, as we are told in the following verse of the Qur'an:
"You cannot guide those you would like to but Allah guides those He wills. He has best knowledge of the guided."
