Baha'is believe that today, with ample opportunities for education, all must investigate the truth independently. Every Baha'i should have a full understanding of the religion's teachings, and be responsible for propagating them.
依照大同教的教義來說，在從前的社會中，因為教育尚未普及，基於實際需耍，必須聘用一群專業的傳教士，負責研究教義和指導信徒遵守戒律。然而，現代教育普及，每個人都能自行探求真理，用自己的眼睛去看、耳朵去聽、用自己的理解力去瞭解，不需要再設置傳教士。