Principles of Moral Thought and Action
The Baha'i Faith is much more focused on morality than on theology and metaphysics. The purpose of a system of ethics is to achieve human happiness through right human action. This involves "drawing closer to the Threshold of Almighty God," which means acquiring the divine attributes such that human actions are more closely aligned to the divine standard. Acting in accordance with the divine attributes such as trustworthiness, truthfulness, purity of heart, and patience, is according to Baha'u'llah, "the highest and most laudable of all acts." To follow this path enables human beings to discover their true selves, which are spiritual.
The Baha'i moral code, while claiming to be rational and reasonable, does not base its authority on this. Rather the Baha'i scriptures are the foundation and inspiration of Baha'i ethics. Baha'u'llah stated that scripture is the "unerring balance," the standard for what is good and evil, and that the commands in the scripture are in agreement with the reality of things. While individual morality and the virtues that human beings are urged to acquire remain much the same over successive religious dispensations, human society changes and evolves and so the social virtues are in need of adjustment from time to time. This is one of the main reasons for the succession of prophets through the ages. But within each age, the word of the Manifestation of God (the founders of the world religions) is the authority even for social laws. Human beings do not have the right to change these; if they need to be changed, God sends a new Manifestation. This general rule in the history of humanity has been altered to some extent in the Baha'i Faith with the institution of the Universal House of Justice, to which Baha'u'llah gave the authority to lay down and abrogate social legislation, supplementary to what is in the Baha'i scriptures.
From Baha'u'llah's Writings
Be generous in prosperity, and thankful in adversity. Be worthy of the trust of thy neighbor, and look upon him with a bright and friendly face. Be a treasure to the poor, an admonisher to the rich, an answerer of the cry of the needy, a preserver of the sanctity of thy pledge. Be fair in thy judgment, and guarded in thy speech. Be unjust to no man, and show all meekness to all men. Be as a lamp unto them that walk in darkness, a joy to the sorrowful, a sea for the thirsty, a haven for the distressed, an upholder and defender of the victim of oppression. Let integrity and uprightness distinguish all thine acts. Be a home for the stranger, a balm to the suffering, a tower of strength for the fugitive. Be eyes to the blind, and a guiding light unto the feet of the erring. Be an ornament to the countenance of truth, a crown to the brow of fidelity, a pillar of the temple of righteousness, a breath of life to the body of mankind, an ensign of the hosts of justice, a luminary above the horizon of virtue, a dew to the soil of the human heart, an ark on the ocean of knowledge, a sun in the heaven of bounty, a gem on the diadem of wisdom, a shining light in the firmament of thy generation, a fruit upon the tree of humility. (Gleanings from the Writings of Baha'u'llah, no. 130)