"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