In time God knows that everyone will either come to know of Him through word of mouth by someone sharing a testimony, someone being a witness, or by personally getting to know Him through an intimate relationship. There is a BIG difference between “knowing and knowing of”; it is the relationship that makes the difference. The person who has the relationship with God knows exactly what they can ask God, as well as ask God for because they trust in Him, but the person who has no relationship with God has nothing but questions and doubts.
Romans 10:14 says “But before people can ask the Lord for help, they must believe in Him; and before they can believe in Him, they must hear about Him; and for them to hear about the Lord, someone must tell them.”
Be blessed, be encouraged, and have a great day.