He suggests to you that perhaps you are not giving your husband enough of your love, physically and spiritually, to keep his interest centred in you. Marriage problems are often very involved and subtle, and we Bahá’ís, being enlightened and progressive people, should not hesitate, if it seems necessary or desirable, to turn to science for help in such matters. If you and your husband talked over your problems—together or separately—with a good physician you might find that you can cure your own husband, or at least try to do so. It is a great pity that two believers, united in this glorious Cause, and blessed with a family, should not be able to live together really harmoniously, and he feels you should take constructive action and not allow the situation to get worse. When the shadow of separation hangs over a husband and wife they should leave no stone unturned in their effort to avert its becoming a reality. He urges you both to devote more of your time to teaching the Cause and to pray together that Bahá’u’lláh may give you a real and lasting love for each other.
(Shoghi Effendi, The Compilation of Compilations vol II, p. 451)