The Kitáb-i-Aqdas - The Most Holy Book
Index term: institutions vital to, under Society
n53.
Build ye houses of worship throughout the lands
The Bahá'í House of Worship is dedicated to the praise of God. The House of Worship forms the central edifice of the Mashriqu'l-Adhkár (the Dawning-place of the Praise of God), a complex which, as it unfolds in the future, will comprise in addition to the House of Worship a number of dependencies dedicated to social, humanitarian, educational, and scientific pursuits. 'Abdu'l-Bahá describes the Mashriqu'l-Adhkár as "one of the most vital institutions in the world", and Shoghi Effendi indicates that it exemplifies in tangible form the integration of "Bahá'í worship and service". Anticipating the future development of this institution, Shoghi Effendi envisages that the House of Worship and its dependencies "shall afford relief to the suffering, sustenance to the poor, shelter to the wayfarer, solace to the bereaved, and education to the ignorant". In the future, Bahá'í Houses of Worship will be constructed in every town and village.
n82.
Verily, it is enjoined upon you to offer a feast, once in every month
This injunction has become the basis for the holding of monthly Bahá'í festivities and as such constitutes the ordination of the Nineteen Day Feast. In the Arabic Bayán the Báb called upon His followers to gather together once every nineteen days to show hospitality and fellowship. Bahá'u'lláh here confirms this and notes the unifying role of such occasions.
'Abdu'l-Bahá and Shoghi Effendi after Him have gradually unfolded the institutional significance of this injunction. 'Abdu'l-Bahá emphasized the importance of the spiritual and devotional character of these gatherings. Shoghi Effendi, besides further elaborating the devotional and social aspects of the Feast, has developed the administrative element of such gatherings and, in systematically instituting the Feast, has provided for a period of consultation on the affairs of the Bahá'í community, including the sharing of news and messages.
In answer to a question as to whether this injunction is obligatory, Bahá'u'lláh stated it was not (Q&A 48). Shoghi Effendi in a letter written on his behalf further comments:

Attendance at Nineteen Day Feasts is not obligatory but very important, and every believer should consider it a duty and privilege to be present on such occasions.
n134.
the subject of boys
The word translated here as "boys" has, in this context, in the Arabic original, the implication of paederasty. Shoghi Effendi has interpreted this reference as a prohibition on all homosexual relations.
The Bahá'í teachings on sexual morality centre on marriage and the family as the bedrock of the whole structure of human society and are designed to protect and strengthen that divine institution. Bahá'í law thus restricts permissible sexual intercourse to that between a man and the woman to whom he is married.
In a letter written on behalf of Shoghi Effendi it is stated:

No matter how devoted and fine the love may be between people of the same sex, to let it find expression in sexual acts is wrong. To say that it is ideal is no excuse. Immorality of every sort is really forbidden by Bahá'u'lláh, and homosexual relationships He looks upon as such, besides being against nature. To be afflicted this way is a great burden to a conscientious soul. But through the advice and help of doctors, through a strong and determined effort, and through prayer, a soul can overcome this handicap.

Bahá'u'lláh makes provision for the Universal House of Justice to determine, according to the degree of the offence, penalties for adultery and sodomy (Q&A 49).