There are three kinds of Faith: first, that which is from tradition and birth. For example: a child is born of Muhammadan parents, he is a Muhammadan. 65 This faith is weak traditional faith: second, that which comes from Knowledge, and is the faith of understanding. This is good, but there is a better, the faith of practice. This is real faith.
(Abdu’l-Baha, Abdu’l-Baha in London, p. 63)