The Ruling on Secret Da'wah When Prohibited and Its Conditions

Question:
Is secret da'wah prescribed when there is a need for it? And what are its conditions in that case?

Answer:
If a person fears for his safety in a country that does not allow him to do so, he calls to Allah in secret, calling to Allah in secret so that he does not harm himself, and so that he does not harm the da'wah as well. If he is prohibited, he calls to Allah in secret in the gatherings he sees are suitable for da'wah, if he has knowledge and insight, . He must examine himself and be certain that he has knowledge. He said, "Allah said, and His Messenger said," and then he calls to Allah in secret with his brothers, with the groups he meets with in their homes, in their private gatherings, fulfilling what Allah has made obligatory in terms of exaltation. Allah, Glorified and Exalted is He, commanded calling to Him, the Exalted, and He affirmed that in His great Book. And so did His Messenger (peace and blessings be upon him), until the truth is denied, until the people know the truth, and until they are guided to it. If the scholar is silent, and the scholar is silent, and the other scholar is silent, then who will guide the people and direct them to good and guidance?