Is it a condition for the one who calls to Allah that he be a scholar who has memorized the six books and others? And what are the categories of Islamic knowledge?

The questioner : Regarding the third point, which is that we call them to knowledge, we do not know whether they understand this word from us intentionally or unintentionally. They misunderstand it and say, thinking that when we mean knowledge, we want them to memorize the six books by heart and to encompass all sciences, both small and large. Does this mean, if you clarify it for us?

The Shaykh : No, that is not what we say. We must first mean by knowledge the knowledge derived from the Book and the Sunnah. Second, we mean that it is obligatory for Muslims to learn so that they may be saved from these four issues, meaning so that they may be saved from falling into disagreement. Disagreement exists, and they are content with keeping this disagreement because of their distance from knowledge. The more a Muslim learns and his knowledge increases, the further he is from disagreement. Our Lord says in the Noble Qur'an, in addition to the Prophet (peace and blessings be upon him): This is the reality of the Islamic groups. By what do we judge? We judge this by correct knowledge. Then, we want the general Muslims to learn two things: what corrects their creed and what corrects their worship. We do not want every Muslim to become a scholar in tafsir, hadith, fiqh, or language. No, there are scholars who specialize in that, and this is a collective obligation. Knowledge is of two types, as all scholars mention, with no disagreement among them: individual obligation and collective obligation. The individual obligation is what every Muslim is required to learn. I will give only two examples to be brief. Every adult Muslim is obligated to pray, and no one is exempt from this prayer. Therefore, it is an individual obligation for every Muslim to learn what makes the prayer valid: the conditions of prayer, its pillars, and its obligations. This is an obligation on every Muslim. Do the members of the Tabligh group fulfill this in themselves, let alone convey it to others? The answer is no. Therefore, they are abandoning an individual obligation, and they are held accountable.