The Importance of Calling People to Allah (Mighty and Majestic) for Students of Knowledge

A student of knowledge must, after that: ...that he be a caller to Allah (Mighty and Majestic). Calling is not the same as teaching. A teacher sits in his chair and teaches whoever comes to him, or he sits in his place in the mosque and teaches whoever comes to him. But the caller is the one who goes out to teach people. He must be a caller. The caller is the one who travels through villages and cities and calls people to Allah (Mighty and Majestic), just as the Prophet (peace and blessings be upon him) used to present himself to the tribes during the season days before he migrated, calling them to Allah. So the caller to Allah the Exalted must have movement. Then he must avoid what leads to confusion and getting involved in it, in his opinion. For example, if he has things that contradict what people are upon, he should not spread them among people until he is able to have value and his words are accepted. Because if he is small and brings what people do not know or recognize, he becomes a target for talk and gossip, and perhaps nothing will be accepted from him after that.