"Be as a lamp unto them that walk in darkness..."

"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 to 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."
-Baha'u'llah, Epistle to the Son of the Wolf, pp. 93-94

"O Brother! Not every sea hath pearls..."

"O My friend, listen with heart and soul to the songs of the spirit, and treasure them as thine own eyes. For the heavenly wisdoms, like the clouds of spring, will not rain down on the earth of men’s hearts forever; and though the grace of the All-Bounteous One is never stilled and never ceasing, yet to each time and era a portion is allotted and a bounty set apart, this in a given measure. “And no one thing is there, but with Us are its storehouses; and We send it not down but in settled measure.” (Qur’án 15:21) The cloud of the Loved One’s mercy raineth only on the garden of the spirit, and bestoweth this bounty only in the season of spring. The other seasons have no share in this greatest grace, and barren lands no portion of this favor.

O Brother! Not every sea hath pearls; not every branch will flower, nor will the nightingale sing thereon. Then, ere the nightingale of the mystic paradise repair to the garden of God, and the rays of the heavenly morning return to the Sun of Truth—make thou an effort, that haply in this dustheap of the mortal world thou mayest catch a fragrance from the everlasting garden, and live forever in the shadow of the peoples of this city. And when thou hast attained this highest station and come to this mightiest plane, then shalt thou gaze on the Beloved, and forget all else."

-Baha'u'llah, The Seven Valleys of Baha'u'llah pp. 37-38