The student of knowledge knowing that he is qualified for the da'wah

Question:
A question following the first one: How does a person know from himself that he has reached a level of knowledge that enables him to call people to Allah the Exalted? Does he wait for his shaykhs to tell him, "You are qualified, go and call people to Allah," or how?

Answer:
If he knows the truth, he knows good and evil, and he knows guidance and misguidance, then he is qualified to call people to Allah, even if no one tells him, "Call people to Allah." Allah has told him to call people to Allah and to call people to the way of his Lord. He knows his own qualification if he knows the rulings of the Shari'ah, has fiqh (Islamic jurisprudence) in the religion of Allah, and has knowledge of what is halal and haram, shirk (associating partners with Allah), tawhid (the oneness of Allah), iman (faith), nifaq (hypocrisy), and so on. Then he is qualified. But if he is ignorant of these matters, or some of them, he still needs to be qualified. Yes.