What is the ruling on a Muslim woman marrying a Muslim man while she is in a state of doubt and conjecture regarding the existence of the Creator and the truthfulness of Muhammad?

Doubt concerning the existence of the Creator is of two types: The first is a whisper from Satan, while faith remains firm. The ruling for this is to seek refuge in Allah and repel the whispers. The second is a doubt settled in the heart that leads to disbelief, and its ruling is the obligation of repentance. If the doubt is of the first type, it is permissible to marry the questioner. If it is of the second type, it is not permissible except after repentance. The existence of the Creator is established by reason and scripture. The universe and its order, and the existence of man himself, cannot possibly exist without a Creator, as Allah says: "Or were they created by nothing, or were they the creators?" The truthfulness of the message is evident from the biography of Prophet Muhammad, peace and blessings be upon him, and his morals before his prophethood, the miracles with which Allah supported him, such as the Quran, the unseen prophecies that came true, and his triumph over his enemies and his conquests.