Is the call to tawhid (the oneness of Allah) or to general matters of faith?

Question : In my speech regarding the call to Allah, do we speak of tawhid (the oneness of Allah) as the prophets spoke, or do we speak in other ways, such as speaking generally about matters of faith?

Answer : The call to Allah the Exalted is never permissible to deviate from what the messengers called to, but the methods of the call may differ. The scholars today call to Allah the Exalted by telephone, by recording, by radio, by bulletins, and by such means. These means did not exist, to our knowledge, in the time of the prophets. However, the core of the call and what a person calls to must not deviate from the path of the prophets. If one calls to what contradicts the path of Allah, it means he is misguided, as Allah the Exalted said: It is obligatory for the student of knowledge who calls to Allah to understand the difference between means and objectives.