In its book “Eqtedarat”, the Excellency Bahaullah says: “Today, if a person dominates on all the world sciences; but rejects Baha’ism, he/she is the most ignorant in the sight of God.”
Also, Mr. Ishraq Khawari narrates from Bahaullah in its book “the heavenly food”: A person who doesn’t become Baha’i or rejects my teachings is of the ignorant.”