In this connection, the Guardian feels the necessity of bringing
to your attention the fact that the validity of a Baha’i
marriage is conditioned upon the consent of the two parties and
their parents only. So that in case the other members of your
family show any dislike or opposition to your sister’s union …
their objection does under no circumstances invalidate it. Your
parents’ approval would be sufficient, even though all the rest
of your family may violently oppose it.