Islam has paid much attention to the style of speaking and the way people speak to each other. It encouraged us to use good, thoughtful and righteous language while talking to others. Qur'an also highlighted the importance of being polite while spreading Islam and that can be through wisdom, good advice and constructive argument. This study aims at emphasizing the importance of good language and its effect on people especially while doing Dawa (invitation to Islam). The core of the study is to raise a real awareness of this aspect.