…there are undoubtedly cases in which the individual finds himself (or herself) unable to eliminate a physical attraction to members of the same sex, even though he succeeds in controlling his behavior. This is but one of the many trials and temptations to which human beings are subject in this life. For Bahá'ís, it cannot alter the basic concept taught by Bahá'u'lláh, that the kind of sexuality purposed by God is the love between a man and a woman, and that its primary (but not its only) purpose is the bringing of children into this world and providing them with a loving and protective environment in which they can be reared to know and love God.
If, therefore, a homosexual cannot overcome his or her condition to the extent of being able to have a heterosexual marriage, he or she must remain single, and abstain from sexual relations. These are the same requirements as for a heterosexual person who does not marry. While Bahá'u'lláh encourages the believers to marry, it is important to note that marriage is by no means an obligation. It is for the individual to decide whether he or she wishes to lead a family life or to live in a state of celibacy.
- The Universal House of Justice (From a letter dated 23 May 1995 written on behalf of the Universal House of Justice to the NSA of the United States; published in American Bahá'í 152; Baha’i Library Online)